#[edit]

1. 13q deletion syndrome

1. Cordoba Syndrome

1. 17q21.31 microdeletion syndrome
2. 1p36 deletion syndrome
3. 1q21.1 deletion syndrome
4. 1q21.1 duplication syndrome
5. 22q11.2 distal deletion syndrome
6. 22q11.2 duplication syndrome
7. 22q13 deletion syndrome
8. 2p15-16.1 microdeletion syndrome
9. 2q37 deletion syndrome
10. 3-M syndrome
11. 3C syndrome
12. 3q29 microdeletion syndrome
13. 49,XXXXY
14. 4D syndrome
15. 8p23.1 duplication syndrome
16. 9q34 deletion syndrome

A[edit]

1. Ape Disorder
2. Aagenaes syndrome
3. Aarskog–Scott syndrome
4. Aase syndrome
5. Abandoned child syndrome
6. ABCD syndrome
7. Abdallat–Davis–Farrage syndrome
8. Abderhalden–Kaufmann–Lignac syndrome
9. Abdominal compartment syndrome
10. Abdominal wall pain syndrome
11. Ablepharon macrostomia syndrome
12. Abruzzo–Erickson syndrome
13. Achard syndrome
14. Achard–Thiers syndrome
15. Ackerman syndrome
16. Acorea, microphthalmia and cataract syndrome
17. Acrocallosal syndrome
18. Acropectoral syndrome
19. Acro–dermato–ungual–lacrimal–tooth syndrome
20. Activation syndrome
21. Acute aortic syndrome
22. Acute brain syndrome
23. Acute chest syndrome
24. Acute coronary syndrome
25. Acute HME syndrome
26. Acute interstitial pneumonitis
27. Acute motor axonal neuropathy
28. Acute platelet activation syndrome
29. Acute radiation syndrome
30. Acute respiratory distress syndrome
31. Acute retroviral syndrome
32. Adams–Nance syndrome
33. Adams–Oliver syndrome
34. Adams–Stokes syndrome
35. Adducted thumb syndrome
36. Adie syndrome
37. Adiposogenital dystrophy
38. Adult-onset immunodeficiency syndrome
39. Advanced sleep phase disorder
40. Aerotoxic syndrome
41. Afferent loop syndrome
42. Aicardi syndrome
43. Aicardi–Goutières syndrome
44. AIDS dysmorphic syndrome
45. Al-Raqad syndrome
46. Alagille syndrome
47. Albinism–deafness syndrome
48. Alcohol withdrawal syndrome
49. Alezzandrini syndrome
50. Alice in Wonderland syndrome
51. Alien hand syndrome
52. Allan–Herndon–Dudley syndrome
53. Allopurinol hypersensitivity syndrome
54. Alopecia contractures dwarfism mental retardation syndrome
55. Alpha-thalassemia mental retardation syndrome
56. Alport syndrome
57. Alström syndrome
58. Alvarez' syndrome
59. Amennorrhea-galactorrhea syndrome
60. Amniotic band constriction
61. Amotivational syndrome
62. Amplified musculoskeletal pain syndromes
63. Andermann syndrome
64. Andersen–Tawil syndrome
65. Androgen insensitivity syndrome
66. Angelman syndrome
67. ANOTHER syndrome
68. Anterior cerebral artery syndrome
69. Anterior compartment syndrome
70. Anterior cutaneous nerve entrapment syndrome
71. Anterior interosseous syndrome
72. Anterior spinal artery syndrome
73. Anticonvulsant hypersensitivity syndrome
74. Antidepressant discontinuation syndrome
75. Antiphospholipid syndrome
76. Antisynthetase syndrome
77. Antley–Bixler syndrome
78. Anton–Babinski syndrome
79. Aortic arch syndrome
80. Aortocaval compression syndrome
81. Apert syndrome
82. Apparent mineralocorticoid excess syndrome
83. Arakawa's syndrome II
84. Ardalan–Shoja–Kiuru syndrome
85. AREDYLD syndrome
86. Aromatase excess syndrome
87. Arterial tortuosity syndrome
88. Arthrogryposis–renal dysfunction–cholestasis syndrome
89. Arts syndrome
90. Ascher's syndrome
91. Asherman's syndrome
92. Asperger syndrome
93. Asymmetric crying facies
94. Ataxia-pancytopenia syndrome
95. Ataxia-telangiectasia
96. Athletic heart syndrome
97. Athymhormic syndrome
98. ATR-16 syndrome
99. Atrophodermia vermiculata
100. Atypical hemolytic uremic syndrome
101. Austrian syndrome
102. Autoimmune disease
103. Autoimmune lymphoproliferative syndrome
104. Autoimmune polyendocrine syndrome type 1
105. Autoimmune polyendocrine syndrome type 2
106. Autoimmune polyendocrine syndrome type 3
107. Autoimmune polyendocrine syndrome
108. Autoinflammatory syndromes
109. Avellis syndrome
110. Axenfeld syndrome
111. Axial spondyloarthritis
112. Ayazi syndrome

B[edit]

1. Babinski–Nageotte syndrome
2. Baboon syndrome
3. Baggio–Yoshinari syndrome
4. Baller–Gerold syndrome
5. Bamforth–Lazarus syndrome
6. Bangstad syndrome
7. Bannayan–Riley–Ruvalcaba syndrome
8. Banti's syndrome
9. Barakat syndrome
10. Barakat-Perenthaler syndrome
11. Bardet–Biedl syndrome
12. Bare lymphocyte syndrome type II
13. Bare lymphocyte syndrome
14. Barlow's syndrome
15. Barraquer–Simons syndrome
16. Bart syndrome
17. Barth Syndrome
18. Bartter syndrome
19. Bart–Pumphrey syndrome
20. Bassen-Kornzweig syndrome
21. Battered person syndrome
22. Bazex–Dupré–Christol syndrome
23. Beare–Stevenson cutis gyrata syndrome
24. Beckwith–Wiedemann syndrome
25. Behcet's syndrome
26. Behr syndrome
27. Benedikt syndrome
28. Benign fasciculation syndrome
29. Benjamin syndrome
30. Benzodiazepine withdrawal syndrome
31. Berdon syndrome
32. Berk–Tabatznik syndrome
33. Bernard–Soulier syndrome
34. Berserk llama syndrome
35. Bhaskar–Jagannathan syndrome
36. Biemond syndrome
37. Bilious vomiting syndrome
38. Binder's syndrome
39. Bing–Neel syndrome
40. Birt–Hogg–Dubé syndrome
41. Björnstad syndrome
42. Bland-White-Garland syndrome
43. Blau syndrome
44. Blepharophimosis, ptosis, epicanthus inversus syndrome
45. Blind loop syndrome
46. Bloom syndrome
47. Blount's disease
48. Blue baby syndrome
49. Blue diaper syndrome
50. Blue rubber bleb nevus syndrome
51. Blue toe syndrome
52. Bobble-head doll syndrome
53. Body fat redistribution syndrome
54. Boehm syndrome
55. Boerhaave syndrome
56. Bogart–Bacall syndrome
57. Bohring–Opitz syndrome
58. Bonnet–Dechaume–Blanc syndrome
59. Bowen–Conradi syndrome
60. Brachycephalic airway obstructive syndrome
61. Brainstem stroke syndrome
62. Branchio-oculo-facial syndrome
63. Branchio-oto-renal syndrome
64. Bromism
65. Brown's syndrome
66. Brown-Séquard syndrome
67. Brown–Vialetto–Van Laere syndrome
68. Bruck syndrome
69. Brugada syndrome
70. Brunner syndrome
71. Budd–Chiari syndrome
72. Burning feet syndrome
73. Burning mouth syndrome
74. Burnside–Butler syndrome
75. Buschke–Ollendorff syndrome
76. Bálint's syndrome
77. Börjeson-Forssman-Lehmann syndrome

C[edit]

1. CADASIL
2. Camera-Marugo-Cohen syndrome
3. CAMFAK syndrome
4. Camptodactyly-arthropathy-coxa vara-pericarditis syndrome
5. Cancer syndrome
6. Cancer-related fatigue
7. CANDLE syndrome
8. Canine epileptoid cramping syndrome
9. Cannabinoid hyperemesis syndrome (CHS)
10. Cantú syndrome
11. Capgras delusion
12. Capgras syndrome
13. Capillary leak syndrome
14. Caplan's syndrome
15. Carcinoid syndrome
16. Cardiac syndrome X
17. Cardiofaciocutaneous syndrome
18. Cardiorenal syndrome
19. Cardiovascular syndrome
20. Carney complex
21. Caroli disease
22. Carpal tunnel syndrome
23. Carpenter syndrome
24. Cat eye syndrome
25. Cataract-microcornea syndrome
26. Catastrophic antiphospholipid syndrome
27. Catel–Manzke syndrome
28. Cauda equina syndrome
29. Caudal regression syndrome
30. CDK13-related disorder
31. Celebrity worship syndrome
32. Central centrifugal cicatricial alopecia
33. Central cord syndrome
34. Central nervous system syndrome
35. Central pain syndrome
36. Cerebellar cognitive affective syndrome
37. Cerebellar stroke syndrome
38. Cerebellopontine angle syndrome
39. Cerebral salt-wasting syndrome
40. cervical disc syndrome
41. Cervical syndrome
42. Cervicocranial syndrome
43. Charcot–Marie–Tooth disease
44. CHARGE syndrome
45. Charles Bonnet syndrome
46. Chiari–Frommel syndrome
47. Chiasmal syndrome
48. Chilaiditi syndrome
49. Child sexual abuse accommodation syndrome
50. CHILD syndrome
51. childhood myelodysplastic syndrome
52. Childhood tumor syndrome
53. Chinese Restaurant Syndrome
54. Chromosomal deletion syndrome
55. Chromosome 5q deletion syndrome
56. Chronic fatigue syndrome
57. Chronic functional abdominal pain
58. Chronic infantile neurologic cutaneous and articular syndrome
59. Chronic Lyme disease
60. Chronic prostatitis/chronic pelvic pain syndrome
61. Churg–Strauss syndrome
62. Chédiak–Higashi syndrome
63. Claude's syndrome
64. Clinically isolated syndrome
65. CLOVES syndrome
66. COACH syndrome
67. Cobb syndrome
68. Cockayne syndrome
69. Coffin–Lowry syndrome
70. Coffin–Siris syndrome
71. Cogan syndrome
72. Cohen syndrome
73. Compartment syndrome
74. Complement deficiency
75. Complete androgen insensitivity syndrome
76. Complex regional pain syndrome
77. Computer vision syndrome
78. Congenital bilateral perisylvian syndrome
79. Congenital contractural arachnodactyly
80. Congenital generalized lipodystrophy
81. Congenital insensitivity to pain
82. Congenital myasthenic syndrome
83. Congenital nephrotic syndrome
84. Congenital rubella syndrome
85. Conn's syndrome
86. Conorenal syndrome
87. Conradi–Hünermann syndrome
88. Constriction ring syndrome
89. Contiguous gene syndrome
90. Conus medullaris syndrome
91. Cooks syndrome
92. Cord colitis syndrome
93. Corneal-cerebellar syndrome
94. Corneal dystrophy-perceptive deafness syndrome
95. Cornelia de Lange Syndrome
96. Corneodermatoosseous syndrome
97. Coronary steal
98. Costeff syndrome
99. Costello syndrome
100. Cotard delusion
101. Cotard's Syndrome
102. Cotton fever
103. Cowden syndrome
104. Cracked tooth syndrome
105. Cramp fasciculation syndrome
106. Crandall syndrome
107. Craniosynostosis–anal anomalies–porokeratosis syndrome
108. Cranio-lenticulo-sutural dysplasia
109. CREST syndrome
110. Cri du chat
111. Crigler–Najjar syndrome
112. Crome syndrome
113. Cronkhite–Canada syndrome
114. Cross syndrome
115. Crouzon syndrome
116. Crouzonodermoskeletal syndrome
117. Crush syndrome
118. Cruveilhier-Baumgarten syndrome
119. Cryopyrin-associated periodic syndrome
120. Cuboid syndrome
121. Currarino syndrome
122. CuRRL syndrome
123. Cushing's syndrome
124. Cyclic vomiting syndrome
125. Cytokine release syndrome

D[edit]

1. Da Costa's syndrome
2. Daentl Townsend Siegel syndrome
3. Dahlberg Borer Newcomer syndrome
4. Dandy–Walker syndrome
5. De Barsy syndrome
6. de Clérambault's syndrome
7. De Quervain syndrome
8. De Winter syndrome
9. Dead arm syndrome
10. Deficiency of the interleukin-1–receptor antagonist
11. Degenerative disc disease
12. Dejerine–Roussy syndrome
13. Delayed sleep phase disorder
14. Delusional misidentification syndrome
15. Delusional parasitosis
16. Dennie–Marfan syndrome
17. Dentomandibular sensorimotor dysfunction
18. Denys–Drash syndrome
19. DeSanctis–Cacchione syndrome
20. Descending perineum syndrome
21. Diabetic stiff hand syndrome
22. Dialysis disequilibrium syndrome
23. Diencephalic syndrome
24. Diffuse infiltrative lymphocytosis syndrome
25. DiGeorge syndrome
26. Diogenes syndrome
27. Diploid triploid mosaic
28. Disconnection syndrome
29. Distal 18q-
30. Distal intestinal obstruction syndrome
31. Distal trisomy 10q
32. Doege–Potter syndrome
33. Donnai–Barrow syndrome
34. Donohue syndrome
35. DOOR syndrome
36. Dopamine dysregulation syndrome
37. Down syndrome
38. Dravet syndrome
39. Dressler syndrome
40. Drug reaction with eosinophilia and systemic symptoms
41. Dry eye syndrome
42. Duane syndrome
43. Duane-radial ray syndrome
44. Dubin–Johnson syndrome
45. Dubowitz syndrome
46. Dumping syndrome
47. dysarthria-clumsy hand syndrome
48. Dysexecutive syndrome
49. Dyskeratosis congenita
50. Dysplastic nevus syndrome

E[edit]

1. Eagle syndrome
2. cumming syndrome
3. Ectrodactyly–ectodermal dysplasia–cleft syndrome
4. Edwards syndrome
5. EEM syndrome
6. Egg drop syndrome
7. Ehlers–Danlos syndrome
8. Eiken syndrome
9. Einstein syndrome
10. Eisenmenger's syndrome
11. Eldomery-Sutton syndrome
12. Elejalde syndrome
13. Ellis–van Creveld syndrome
14. Emanuel syndrome
15. Empty nest syndrome
16. Empty nose syndrome
17. Empty sella syndrome
18. Enlarged vestibular aqueduct syndrome
19. Environmental dependency syndrome
20. Eosinophilia–myalgia syndrome
21. Eosinophilic cellulitis
22. Epidermal nevus syndrome
23. Epilepsy syndromes
24. Episodic dyscontrol syndrome
25. Epizootic ulcerative syndrome
26. Erdheim–Chester disease
27. Erondu–Cymet syndrome
28. Estrogen insensitivity syndrome
29. Euthyroid sick syndrome
30. Evans syndrome
31. Excess ovarian androgen release syndrome
32. Exploding head syndrome
33. Extrapyramidal symptoms

F[edit]

1. FACES syndrome
2. Facet syndrome
3. Facial Onset Sensory Motor Neuropathy syndrome
4. Fahr's syndrome
5. Failed back syndrome
6. familial cholestasis syndrome
7. Familial cold autoinflammatory syndrome
8. Familial Mediterranean fever
9. Familial partial lipodystrophy
10. Fanconi syndrome
11. Favre–Racouchot syndrome
12. Febrile infection-related epilepsy syndrome
13. Febrile neutrophilic dermatosis
14. Fechtner syndrome
15. Feingold syndrome
16. Feline hyperesthesia syndrome
17. Felty's syndrome
18. Femur fibula ulna syndrome
19. Fetal alcohol syndrome
20. Fetal hydantoin syndrome
21. Fetal trimethadione syndrome
22. Fetal valproate syndrome
23. Fetal warfarin syndrome
24. FG syndrome
25. Fibrinolysis syndrome
26. Fibromyalgia syndrome
27. Fibromyalgia
28. First arch syndrome
29. Fish acute toxicity syndrome
30. Fitz-Hugh–Curtis syndrome
31. Fitzsimmons–Guilbert syndrome
32. Flammer syndrome
33. Fleischer's syndrome
34. Floating–Harbor syndrome
35. Floppy eyelid syndrome
36. Floppy trunk syndrome
37. Florid cutaneous papillomatosis
38. Flynn–Aird syndrome
39. Foal immunodeficiency syndrome
40. Foerster's syndrome
41. Foix–Alajouanine syndrome
42. Foix–Chavany–Marie syndrome
43. Folie à deux
44. Follicle-stimulating hormone insensitivity
45. foramen magnum compression syndrome
46. Forbes-Albright syndrome
47. Foreign accent syndrome
48. Foster–Kennedy syndrome
49. Fountain syndrome
50. Foville's syndrome
51. Fragile X syndrome
52. Fragile X-associated tremor/ataxia syndrome
53. Franceschetti–Klein syndrome
54. Frank–ter Haar syndrome
55. Fraser syndrome
56. Frasier syndrome
57. Freeman–Sheldon syndrome
58. Frey's syndrome
59. Froin's syndrome
60. Fryns syndrome
61. Functional somatic syndrome

G[edit]

1. Gaisböck syndrome
2. Galloway Mowat syndrome
3. GAPO syndrome
4. Gardner's syndrome
5. Gastric outlet obstruction
6. Gastrocutaneous syndrome
7. Gastrointestinal syndrome
8. Genitopatellar syndrome
9. Gerstmann syndrome
10. Gerstmann–Sträussler–Scheinker syndrome
11. Geschwind syndrome
12. Gianotti–Crosti syndrome
13. Giant platelet disorder
14. Guillain–Barré syndrome
15. Gillespie syndrome
16. Gitelman syndrome
17. Gleich's syndrome
18. GMS syndrome
19. Goldberg–Shprintzen syndrome
20. Goldenhar syndrome
21. Gomez and López-Hernández syndrome
22. Gonadotropin insensitivity
23. Gonadotropin-releasing hormone insensitivity
24. Goodpasture syndrome
25. Gordon syndrome
26. Gougerot–Blum syndrome
27. Gourmand syndrome
28. Gouverneurs syndrome
29. GRACILE syndrome
30. Graham-Little syndrome
31. Gray baby syndrome
32. Gray platelet syndrome
33. Grayson–Wilbrandt corneal dystrophy
34. Greater trochanteric pain syndrome
35. Green nail syndrome
36. Greig cephalopolysyndactyly syndrome
37. Grinspan's syndrome
38. Griscelli syndrome type 2
39. Griscelli syndrome type 3
40. Griscelli syndrome
41. Grisel's syndrome
42. Growing teratoma syndrome
43. Grunya's Syndrome
44. Gilbert's syndrome
45. Gulf War syndrome
46. Gullo syndrome

H[edit]

1. Haber syndrome
2. Hagemoser–Weinstein–Bresnick syndrome
3. Haglund's syndrome
4. Haim–Munk syndrome
5. Hajdu–Cheney syndrome
6. Halal syndrome
7. Hallermann–Streiff syndrome
8. Hamman's syndrome
9. Hamman-Rich syndrome
10. Hand-foot-genital syndrome
11. Handigodu syndrome
12. Hanhart syndrome
13. Hantavirus pulmonary syndrome
14. Hapnes Boman Skeie syndrome
15. Harlequin syndrome
16. Harris platelet syndrome
17. Harrison syndrome
18. Havana syndrome
19. Hay–Wells syndrome
20. Hearing loss with craniofacial syndromes
21. HEC syndrome
22. Heel pad syndrome
23. Heel spur syndrome
24. Heerfordt syndrome
25. HELLP syndrome
26. Hemihyperplasia–multiple lipomatosis syndrome
27. Hemimegalencephaly
28. Hemispatial neglect
29. Hemoglobin Lepore syndrome
30. Hemolytic-uremic syndrome
31. Hennekam syndrome
32. Hepatopulmonary syndrome
33. Hepatorenal syndrome
34. Hereditary breast–ovarian cancer syndrome
35. Hereditary hyperbilirubinemia
36. Hereditary leiomyomatosis and renal cell cancer syndrome
37. Hereditary neuralgic amyotrophy
38. Hereditary nonpolyposis colorectal cancer
39. Hermansky–Pudlak syndrome
40. Hero syndrome
41. Heyde's syndrome
42. High-rise syndrome
43. Hinman syndrome [Wikidata] (Lazy bladder syndrome)
44. HIV/AIDS
45. Holiday heart syndrome
46. Holt–Oram syndrome
47. [Miguel syndrome]]
48. Horn-Kolb syndrome
49. Horner's syndrome
50. Howel–Evans syndrome
51. Hoyeraal-Hreidarsson syndrome
52. Ho–Kaufman–Mcalister syndrome
53. Hughes–Stovin syndrome
54. Hunan hand syndrome
55. Hunter syndrome
56. Huntington's disease-like syndrome
57. HUPRA syndrome
58. Hurler syndrome
59. Hurler–Scheie syndrome
60. Hutchinson–Gilford progeria syndrome
61. Hydrolethalus syndrome
62. Hyper IgM syndrome
63. Hyper-IgD syndrome
64. Hyper-IgM syndrome type 1
65. Hyper-IgM syndrome type 2
66. Hyper-IgM syndrome type 3
67. Hyper-IgM syndrome type 4
68. Hyper-IgM syndrome type 5
69. Hyperimmunoglobulin D syndrome
70. Hyperimmunoglobulin E syndrome
71. Hyperleukocytosis syndrome
72. Hypermobility syndrome
73. Hyperosmolar syndrome
74. Hyperprolactinaemia
75. Hyperprolactinemic SAHA syndrome
76. Hypertension and brachydactyly syndrome
77. Hypertrichosis cubiti
78. Hyperventilation syndrome
79. Hyperviscosity syndrome
80. Hypohidrotic ectodermal dysplasia
81. Hypoplastic left heart syndrome
82. Hypoplastic right heart syndrome
83. Hypotonia
84. Hypotrichosis–acro-osteolysis–onychogryphosis–palmoplantar keratoderma–periodontitis syndrome
85. Hypotrichosis–lymphedema–telangiectasia syndrome
86. Hystrix-like ichthyosis–deafness syndrome

I[edit]

1. Ichthyosis follicularis with alopecia and photophobia syndrome
2. Ichthyosis prematurity syndrome
3. Idiopathic pneumonia syndrome
4. Idiopathic postprandial syndrome
5. Idiopathic pure sudomotor failure
6. Iliotibial band syndrome
7. Imerslund–Gräsbeck syndrome
8. Immersion foot syndromes
9. Immune reconstitution inflammatory syndrome
10. Immunodeficiency–centromeric instability–facial anomalies syndrome
11. Impingement syndrome
12. Imposter syndrome
13. Incontinentia pigmenti
14. Infant respiratory distress syndrome
15. Inferior vena cava syndrome
16. Infertility in polycystic ovary syndrome
17. Influenza-like illness
18. Institutional syndrome
19. Intersection syndrome
20. Interstitial cystitis
21. Intracranial hypertension syndrome
22. Intraoperative floppy iris syndrome
23. Intravenous marijuana syndrome
24. IPEX syndrome
25. Iridocorneal endothelial syndrome
26. Irlen syndrome
27. Irregular sleep–wake rhythm
28. irritable bladder syndrome
29. Irritable bowel syndrome
30. Irritable male syndrome
31. Irukandji syndrome
32. Irvine–Gass syndrome
33. Isolated brainstem syndrome

J[edit]

1. Jackson–Weiss syndrome
2. Jacobsen syndrome
3. Jaffe–Campanacci syndrome
4. Jalili syndrome
5. Jansen's metaphyseal chondrodysplasia
6. Janz syndrome
7. Jeavons syndrome
8. Jervell and Lange-Nielsen syndrome
9. Johanson–Blizzard syndrome
10. Johnson–McMillin syndrome
11. Johnson–Munson syndrome
12. Joubert syndrome
13. Juberg-Hellman syndrome
14. Jugular foramen syndrome
15. Juvenile polyposis syndrome
16. Jerusalem syndrome

K[edit]

1. Kabuki syndrome
2. Kallmann syndrome
3. Kapur–Toriello syndrome
4. Karak syndrome
5. Karsch-Neugebauer syndrome
6. Kartagener's syndrome
7. Kasabach–Merritt syndrome
8. Katz syndrome
9. Kaufman oculocerebrofacial syndrome
10. Kearns–Sayre syndrome
11. Keppen–Lubinsky syndrome
12. Keratitis–ichthyosis–deafness syndrome
13. Keratosis linearis with ichthyosis congenita and sclerosing keratoderma syndrome
14. Keutel syndrome
15. Khyâl cap
16. Kimmelstiel-Wilson syndrome
17. Kindler syndrome
18. King–Kopetzky syndrome
19. Kleine–Levin syndrome
20. Klinefelter syndrome
21. Klippel–Feil syndrome
22. Klippel–Trénaunay syndrome
23. Klüver–Bucy syndrome
24. Knobloch syndrome
25. Kocher–Debre–Semelaigne syndrome
26. kodiak syndrome
27. Kohlschütter-Tönz syndrome
28. Korsakoff's syndrome
29. Kostmann syndrome
30. Kounis syndrome
31. Kowarski syndrome
32. Kufor–Rakeb syndrome
33. König's syndrome

L[edit]

1. Lachiewicz–Sibley syndrome
2. Lacunar Stroke Syndrome
3. Lambert–Eaton myasthenic syndrome
4. Landau–Kleffner syndrome
5. Langer–Giedion syndrome
6. Laron syndrome
7. Larsen syndrome
8. Laryngoonychocutaneous syndrome
9. Lateral medullary syndrome
10. Lateral meningocele syndrome
11. Lateral pontine syndrome
12. Laugier–Hunziker syndrome
13. Laurence–Moon syndrome
14. Lavender foal syndrome
15. Lawrence–Seip syndrome
16. Lazarus syndrome
17. Leaky gut syndrome
18. Legg–Calvé–Perthes disease
19. Legius syndrome
20. Leiner's disease
21. Lelis syndrome
22. Lemierre's syndrome
23. Lennox–Gastaut syndrome
24. Lenz microphthalmia syndrome
25. Lenz–Majewski syndrome
26. Leriche's syndrome
27. Leschke syndrome
28. Lesch–Nyhan syndrome
29. Lethal congenital contracture syndrome
30. Lethal white syndrome
31. Leukotriene receptor antagonist-associated Churg–Strauss syndrome
32. Levator ani syndrome
33. Leydig cell hypoplasia
34. Liddle's syndrome
35. Liebenberg syndrome
36. LIG4 syndrome
37. Lima syndrome
38. Limb girdle syndrome
39. Limber tail syndrome
40. Limb–mammary syndrome
41. Linburg–Comstock syndrome
42. Li–Fraumeni syndrome
43. Locked-in syndrome
44. Locomotive syndrome
45. Loeys–Dietz syndrome
46. Loin pain hematuria syndrome
47. Long COVID
48. Long face syndrome
49. Long QT syndrome
50. Loose anagen syndrome
51. Lown–Ganong–Levine syndrome
52. Lowry–MacLean syndrome
53. Lucey–Driscoll syndrome
54. Lujan–Fryns syndrome
55. lumbar disc syndrome
56. Lupus-like syndrome
57. Lutembacher's syndrome
58. Lymphangitis carcinomatosa
59. Lymphedema–distichiasis syndrome
60. Lynch syndrome
61. Lyngstadaas syndrome
62. Löffler's syndrome
63. Löfgren syndrome

M[edit]

1. M74 syndrome
2. Macrocephaly-capillary malformation
3. Macrophage activation syndrome
4. Maffucci syndrome
5. Majeed syndrome
6. Majewski's polydactyly syndrome
7. Mal de debarquement
8. Malformative syndrome
9. Mallory–Weiss syndrome
10. Malnutrition–inflammation complex
11. Malouf syndrome
12. Malpuech facial clefting syndrome
13. Management of chronic headaches
14. Manning criteria
15. Marchiafava–Bignami disease
16. Marden–Walker syndrome
17. Mare reproductive loss syndrome
18. Marfan syndrome
19. Marfanoid–progeroid–lipodystrophy syndrome
20. Marie Antoinette syndrome
21. Marinesco–Sjögren syndrome
22. Maroteaux–Lamy syndrome
23. Marshall syndrome
24. Marshall–Smith syndrome
25. Marshall–White syndrome
26. MASA syndrome
27. Mast cell activation syndrome
28. Mauriac syndrome
29. Mayer–Rokitansky–Küster–Hauser syndrome
30. May–Thurner syndrome
31. May–White syndrome
32. McArdle syndrome
33. McCune–Albright syndrome
34. McCusick syndrome
35. McGillivray syndrome
36. McKittrick–Wheelock syndrome
37. McKusick–Kaufman syndrome
38. McLeod syndrome
39. MDP syndrome
40. Mean world syndrome
41. Meckel syndrome
42. Meconium aspiration syndrome
43. Medial medullary syndrome
44. Medial pontine syndrome
45. Median arcuate ligament syndrome
46. Medical students' disease
47. MEDNIK syndrome
48. Megavitamin-B₆ syndrome
49. Meige's syndrome
50. Meigs' syndrome
51. MELAS syndrome
52. Melkersson–Rosenthal syndrome
53. Melnick–Needles syndrome
54. Memory distrust syndrome
55. Mendelson's syndrome
56. Ménière's disease
57. Menkes disease
58. MERRF syndrome
59. Metabolic syndrome
60. Michelin tire baby syndrome
61. Michels Caskey syndrome
62. Michels syndrome
63. Mickleson syndrome
64. Micro syndrome
65. Microdeletion syndrome
66. Microphthalmia–dermal aplasia–sclerocornea syndrome
67. Middle cerebral artery syndrome
68. Middle child syndrome
69. Middle East respiratory syndrome
70. Mikulicz syndrome
71. Mild androgen insensitivity syndrome
72. Milk-alkali syndrome
73. Millard–Gubler syndrome
74. Miller Fisher syndrome
75. Miller syndrome
76. Miller–Dieker syndrome
77. Milroy's disease
78. Milwaukee shoulder syndrome
79. Mirhosseini–Holmes–Walton syndrome
80. Mirizzi's syndrome
81. Mirror syndrome
82. Mismatch repair cancer syndrome
83. Mitochondrial DNA depletion syndrome
84. Mitochondrial neurogastrointestinal encephalopathy syndrome
85. Mitral valve prolapse
86. Mittelschmerz
87. Mohr–Tranebjærg syndrome
88. MOMO syndrome
89. Monofixation syndrome
90. MonoMAC
91. mononucleosis like syndrome
92. Morgagni Stewart Morel syndrome
93. MORM syndrome
94. Morquio syndrome
95. Morvan's syndrome
96. Mouth and genital ulcers with inflamed cartilage syndrome
97. Mowat–Wilson syndrome
98. Moyamoya disease
99. Moynahan syndrome
100. Muckle–Wells syndrome
101. Muenke syndrome
102. Muir–Torre syndrome
103. Mukamel syndrome
104. Multiple endocrine neoplasia type 1
105. Multiple endocrine neoplasia type 2
106. Multiple evanescent white dot syndrome
107. Multiple hamartoma syndrome
108. Multiple organ dysfunction syndrome
109. Multiple pterygium syndrome
110. Munchausen syndrome
111. Mungan syndrome
112. Musical ear syndrome
113. Mycosis fungoides
114. Myelodysplastic syndrome
115. Myoclonic astatic epilepsy
116. Myofascial pain syndrome
117. Myomatous erythrocytosis syndrome
118. Möbius syndrome
119. Müllerian agenesis

N[edit]

1. Nablus mask-like facial syndrome
2. Naegeli–Franceschetti–Jadassohn syndrome
3. Nager acrofacial dysostosis
4. Nail–patella syndrome
5. Nakajo syndrome
6. Nance–Horan syndrome
7. Napoleonist Syndrome
8. Nasodigitoacoustic syndrome
9. Naxos syndrome
10. Nelson's syndrome
11. NEMO deficiency syndrome
12. Neonatal ichthyosis–sclerosing cholangitis syndrome
13. Nephritic syndrome
14. Nephrotic syndrome
15. Nerve compression syndrome
16. Netherton syndrome
17. Neu–Laxova syndrome
18. Neuro-cardio-facial-cutaneous syndromes
19. Neurofibromatosis type I
20. Neuroleptic malignant syndrome
21. Neuroleptic-Induced Deficit Syndrome
22. Neutrophil immunodeficiency syndrome
23. Nevo syndrome
24. Nevoid basal-cell carcinoma syndrome
25. Nezelof syndrome
26. Nicolaides–Baraitser syndrome
27. Nicolau–Balus syndrome
28. Night eating syndrome
29. Nijmegen breakage syndrome
30. Njølstad syndrome
31. Nodding disease
32. Non-24-hour sleep–wake disorder
33. Noonan syndrome with multiple lentigines
34. Noonan syndrome
35. Norman–Roberts syndrome
36. Northern epilepsy syndrome
37. Nutcracker syndrome

O[edit]

1. Occipital horn syndrome
2. Ocular ischemic syndrome
3. Oculo-respiratory syndrome
4. Oculoauricular syndrome
5. Oculocerebrocutaneous syndrome
6. Oculocerebrorenal syndrome
7. Oculofaciocardiodental syndrome
8. Oculomucocutaneous syndrome
9. Odontoma dysphagia syndrome
10. Odonto–tricho–ungual–digital–palmar syndrome
11. Ogden Syndrome
12. Ogilvie syndrome
13. Ohtahara syndrome
14. Olfactory reference syndrome
15. Oliver–McFarlane syndrome
16. Omenn syndrome
17. One and a half syndrome
18. Oneiroid syndrome
19. Opitz G/BBB Syndrome
20. Opsoclonus myoclonus syndrome
21. Oral allergy syndrome
22. Oral mite anaphylaxis
23. Oral-facial-digital syndrome
24. Orbital apex syndrome
25. Organic brain syndrome
26. Organic dust toxic syndrome
27. Orofaciodigital syndrome 1
28. Ortner's syndrome
29. Os trigonum syndrome
30. OSLAM syndrome
31. Osler–Weber–Rendu disease
32. Otodental syndrome
33. Otofacial syndrome
34. Ovarian hyperstimulation syndrome
35. Ovarian vein syndrome
36. Overgrowth syndrome
37. Overlap syndrome

P[edit]

1. Pacak–Zhuang syndrome
2. Pacemaker syndrome
3. Painful bruising syndrome
4. Pallister–Hall syndrome
5. Pallister–Killian syndrome
6. Panayiotopoulos syndrome
7. Pancoast tumor
8. Pantothenate kinase-associated neurodegeneration
9. PAPA syndrome
10. Papillon–Lefèvre syndrome
11. Papillorenal syndrome
12. Papular purpuric gloves and socks syndrome
13. Paraneoplastic acrokeratosis
14. Paraneoplastic cerebellar degeneration
15. Paraneoplastic syndrome
16. Parental alienation syndrome
17. Parinaud's oculoglandular syndrome
18. Parinaud's syndrome
19. Paris-Trousseau syndrome
20. Parkes Weber syndrome
21. Parkinson plus syndrome
22. Paroxysmal hand hematoma
23. Paroxysmal tachycardia
24. Parry–Romberg syndrome
25. Parsonage–Turner syndrome
26. Partial androgen insensitivity syndrome
27. Pashayan syndrome
28. Patau syndrome
29. Patellar subluxation syndrome
30. Patellofemoral pain syndrome
31. Patterson syndrome
32. Pearson syndrome
33. PANDAS
34. Peeling skin syndrome
35. PEHO syndrome
36. Pellegrini–Stieda syndrome
37. Pelvic congestion syndrome
38. Pelvic pain
39. Pemphigus erythematosus
40. Pendred syndrome
41. Penile Artery Shunt Syndrome
42. Pentalogy of Cantrell
43. Periodic fever syndrome
44. Periodic fever, aphthous stomatitis, pharyngitis and adenitis
45. Perisylvian syndrome
46. Perlman syndrome
47. Persistent adrenarche syndrome
48. Persistent genital arousal disorder
49. Persistent Müllerian duct syndrome
50. Pervasive refusal syndrome
51. Peters-plus syndrome
52. Peutz–Jeghers syndrome
53. Pfeiffer syndrome
54. Phantom eye syndrome
55. Phantom limb
56. Phantom vibration syndrome
57. Pickwickian syndrome
58. Pigment dispersion syndrome
59. Pigmented hairy epidermal nevus syndrome
60. Pilotto syndrome
61. Piriformis syndrome
62. Pitt–Hopkins syndrome
63. Plica syndrome
64. Plummer–Vinson syndrome
65. POEMS syndrome
66. Poland syndrome
67. Polar T3 syndrome
68. Polio-like syndrome
69. Polycystic ovary syndrome
70. Popliteal artery entrapment syndrome
71. Popliteal pterygium syndrome
72. Porcine stress syndrome
73. Pork–cat syndrome
74. Post-micturition convulsion syndrome
75. Post-nasal drip syndrome
76. Post-traumatic stress syndrome
77. Post-acute-withdrawal syndrome
78. Post-concussion syndrome
79. Post-Ebola virus syndrome
80. Post-embolization syndrome
81. Post-intensive care syndrome
82. Post-maturity syndrome
83. Post-polio syndrome
84. Post-thrombotic syndrome
85. Post-vasectomy pain syndrome
86. Postcardiotomy syndrome
87. Postcholecystectomy syndrome
88. Posterior cerebral artery syndrome
89. Posterior cord syndrome
90. Posterior rami syndrome
91. Posterior reversible encephalopathy syndrome
92. Postgastrectomy syndromes
93. Postorgasmic illness syndrome
94. Postperfusion syndrome
95. Postpericardiotomy syndrome
96. Postural orthostatic tachycardia syndrome
97. Potocki–Lupski syndrome
98. Potocki–Shaffer syndrome
99. Potter sequence
100. Prader–Willi syndrome
101. Pre-excitation syndrome
102. Precordial catch syndrome
103. Premenstrual syndrome
104. Presumed ocular histoplasmosis syndrome
105. Pretzel syndrome
106. Primary pigmented nodular adrenocortical disease
107. Primrose syndrome
108. Progeroid syndromes
109. Progressive supranuclear palsy
110. Prolonged grief disorder
111. Pronator teres syndrome
112. Propofol infusion syndrome
113. Proteus syndrome
114. Proteus-like syndrome
115. Prune belly syndrome
116. Pseudo-Cushing's syndrome
117. Pseudodementia
118. Pseudoexfoliation syndrome
119. Psychoorganic syndrome
120. Puer aeternus
121. Pulmonary leukostasis syndrome
122. Pulmonary-renal syndrome
123. Purple glove syndrome
124. Purple urine bag syndrome

Q[edit]

1. Qazi–Markouizos syndrome
2. Quadrilateral space syndrome
3. Queen bee syndrome

R[edit]

1. Rabbit syndrome
2. Rabson–Mendenhall syndrome
3. Radial tunnel syndrome
4. Rage syndrome
5. Raghib syndrome
6. Raine syndrome
7. Ramos-Arroyo syndrome
8. Ramsay Hunt syndrome type 1
9. Ramsay Hunt syndrome type 2
10. Ramsay Hunt syndrome
11. RAPADILINO syndrome
12. Rape trauma syndrome
13. Rapp–Hodgkin syndrome
14. Rapunzel syndrome
15. Rasmussen syndrome
16. RASopathy
17. Raymond Céstan syndrome
18. Raynaud syndrome
19. Red ear syndrome
20. Red man syndrome (Drug eruption)
21. Refeeding syndrome
22. Reactive arthritis
23. Renal dysplasia-limb defects syndrome
24. Renfield syndrome
25. Renpenning's syndrome
26. Restless legs syndrome
27. Restrictive dermopathy
28. Retinoic acid syndrome
29. Retirement syndrome
30. Rett syndrome
31. Reversible cerebral vasoconstriction syndrome
32. Revesz syndrome
33. Reye syndrome
34. Reynolds syndrome
35. Reynolds' pentad
36. Rh deficiency syndrome
37. Riddoch syndrome
38. Right middle lobe syndrome
39. Riley-Day Syndrome
40. Riley–Day syndrome
41. Ring chromosome 14 syndrome
42. Ring chromosome 20 syndrome
43. Roberts syndrome
44. Robinow syndrome
45. Rochon-Duvigneaud's syndrome
46. Roemheld syndrome
47. ROHHAD
48. Romano–Ward syndrome
49. Rombo syndrome
50. Rosenthal syndrome
51. Rosenthal–Kloepfer syndrome
52. Ross' syndrome
53. Rosselli–Gulienetti syndrome
54. Rothmund–Thomson syndrome
55. Rotor syndrome
56. Roussy–Lévy syndrome
57. Rubinstein–Taybi syndrome
58. Rud syndrome
59. Rudiger syndrome
60. Rumination syndrome
61. Runting-stunting syndrome in broilers
62. RUQ syndrome
63. Ruzicka Goerz Anton syndrome

S[edit]

1. Saal Bulas syndrome
2. Saal Greenstein syndrome
3. Sabinas brittle hair syndrome
4. Sack–Barabas syndrome
5. SACRAL syndrome
6. Saethre–Chotzen syndrome
7. SAHA syndrome
8. Sakati–Nyhan–Tisdale syndrome
9. Salt water aspiration syndrome
10. Sandifer syndrome
11. Sanfilippo syndrome
12. Sanjad-Sakati syndrome
13. SAPHO syndrome
14. Satoyoshi syndrome
15. Savant syndrome
16. Say syndrome
17. Say–Meyer syndrome
18. Scalp–ear–nipple syndrome
19. SCARF syndrome
20. Scheie syndrome
21. Schimmelpenning syndrome
22. Schinzel–Giedion syndrome
23. Schmitt Gillenwater Kelly syndrome
24. Schnitzler syndrome
25. Schwartz–Jampel syndrome
26. Schöpf–Schulz–Passarge syndrome
27. Scimitar syndrome
28. Scott syndrome
29. Seaver Cassidy syndrome
30. Seckel syndrome
31. Second-impact syndrome
32. Secretan's syndrome
33. Seed dispersal syndrome
34. Senior–Løken syndrome
35. Sensenbrenner syndrome
36. Septo-optic dysplasia
37. Serkal syndrome
38. Serotonin syndrome
39. Serpentine fibula-polycystic kidney syndrome
40. Sertoli cell-only syndrome
41. Serum sickness–like reaction
42. Setleis syndrome
43. Severe acute respiratory syndrome
44. Shaken baby syndrome
45. Shapiro syndrome
46. Sheehan's syndrome
47. Shell nail syndrome
48. Shone's syndrome
49. Short anagen syndrome
50. Short bowel syndrome
51. short limb syndrome
52. Short man syndrome
53. Short QT syndrome
54. Short rib – polydactyly syndrome
55. SHORT syndrome
56. Shoulder hand syndrome (frozen shoulder)
57. Shwachman–Diamond syndrome
58. Shy-Drager syndrome
59. Sick building syndrome
60. Sick sinus syndrome
61. Silver–Russell syndrome
62. Simpson–Golabi–Behmel syndrome
63. Singleton Merten syndrome
64. Situs ambiguus
65. Sjögren's syndrome
66. Sjögren–Larsson syndrome
67. Skeeter syndrome
68. Skin fragility syndrome
69. Sliding uncus syndrome
70. Slit ventricle syndrome
71. Sly syndrome
72. Small intestinal bacterial overgrowth
73. Small Penis Syndrome
74. Smith Martin Dodd syndrome
75. Smith–Fineman–Myers syndrome
76. Smith–Lemli–Opitz syndrome
77. Smith–Magenis syndrome
78. Snapping hip syndrome
79. Snapping scapula syndrome
80. Sneddon's syndrome
81. Solipsism syndrome
82. somatostatinoma syndrome
83. Sopite syndrome
84. Sotos syndrome
85. Space adaptation syndrome
86. Spastic ataxia-corneal dystrophy syndrome
87. Spider lamb syndrome
88. Splenic flexure syndrome
89. Split hand syndrome
90. Spondylo-ocular syndrome
91. SPRED1
92. Staphylococcal scalded skin syndrome
93. STAR syndrome
94. Stauffer syndrome
95. Stendhal syndrome
96. Steroid dementia syndrome
97. Stevens–Johnson syndrome
98. Stewart–Treves syndrome
99. Stickler syndrome
100. Sticky platelet syndrome
101. Sticky skin syndrome
102. Stiff person syndrome
103. Stiff skin syndrome
104. Stimmler syndrome
105. Stockholm syndrome
106. Straight back syndrome
107. Stratton Parker syndrome
108. Streff syndrome
109. Strømme syndrome
110. Stuck song syndrome
111. Student syndrome
112. Sturge–Weber syndrome
113. Subclavian steal syndrome
114. Sudden death syndrome
115. Sudden infant death syndrome
116. Sudden wealth syndrome
117. Sugarman syndrome
118. Sulfonamide hypersensitivity syndrome
119. Summer penile syndrome
120. Sundowning
121. Superior mesenteric artery syndrome
122. Superior orbital fissure syndrome
123. Superior vena cava syndrome
124. Supernumerary nipples–uropathies–Becker's nevus syndrome
125. Supernumerary phantom limb
126. Survivor syndrome
127. Susac's syndrome
128. Sweet's syndrome
129. Swyer–James syndrome
130. Syndrome of inappropriate antidiuretic hormone secretion
131. Syndrome of subjective doubles
132. Syndrome Without A Name
133. HHH syndrome
134. Systemic inflammatory response syndrome
135. Sézary disease

T[edit]

1. Talk and die syndrome
2. TAN syndrome
3. TAR syndrome
4. Tardive dyskinesia
5. Tardive psychosis
6. Tardive syndrome
7. Tarsal tunnel syndrome
8. Taura syndrome
9. Taussig–Bing syndrome
10. Tea and toast syndrome
11. TEMPI syndrome
12. Temple–Baraitser syndrome
13. Tension myositis syndrome
14. Terson syndrome
15. Testicular dysgenesis syndrome
16. Tetra-amelia syndrome
17. Tetralogy of Fallot
18. Teunissen–Cremers syndrome
19. Thevenard syndrome
20. Thoracic insufficiency syndrome
21. Thoracic outlet syndrome
22. Thorn's Syndrome
23. Thrombotic thrombocytopenic purpura
24. Thymoma with immunodeficiency
25. Tietz syndrome
26. Tietze syndrome
27. tight lens syndrome
28. Timothy syndrome
29. TNF receptor associated periodic syndrome
30. Tolosa–Hunt syndrome
31. Tonic tensor tympani syndrome
32. Tooth and nail syndrome
33. TORCH syndrome
34. Tourette syndrome
35. Townes–Brocks syndrome
36. Toxic anterior segment syndrome
37. Toxic oil syndrome
38. Toxic shock syndrome
39. Tracheobronchomegaly
40. Transurethral resection of the prostate syndrome
41. Transverse myelitis
42. Treacher Collins syndrome
43. Trench foot
44. Tricho-hepato-enteric syndrome
45. Trichothiodystrophy
46. Tricho–dento–osseous syndrome
47. Tricho–rhino–phalangeal syndrome
48. Trigeminal trophic syndrome
49. Triple X syndrome
50. Triploid syndrome
51. Trisomy 8
52. Tropical splenomegaly syndrome
53. Trotter's syndrome
54. Truman Syndrome
55. Tsukuhara syndrome
56. Tumor lysis syndrome
57. Tumor necrosis factor receptor associated periodic syndrome
58. Turner syndrome
59. Twiddler's syndrome
60. Twin Anemia-Polycythemia Sequence
61. Twin-to-twin transfusion syndrome

U[edit]

1. Untilitant Brainstem Syndrome
2. Uorica Abdominal Wall
3. Utility brainstem
4. Ulysses syndrome
5. Uncombable hair syndrome
6. Uner Tan syndrome
7. Upper airway resistance syndrome
8. Upper motor neuron syndrome
9. Upshaw–Schulman syndrome
10. Urban survival syndrome
11. Urban–Rogers–Meyer syndrome
12. Urethral syndrome
13. Urofacial syndrome
14. Urticarial vasculitis
15. Usher syndrome
16. UV-sensitive syndrome

V[edit]

1. VACTERL association
2. Valentino's syndrome
3. Van der Woude syndrome
4. van Gogh syndrome
5. Van Wyk and Grumbach syndrome
6. Vanishing bile duct syndrome
7. Vascular access steal syndrome
8. Vasoplegic syndrome
9. Vestibulocerebellar syndrome
10. Vici syndrome
11. Villaret’s syndrome
12. VIP syndrome
13. VIPoma
14. Visual looming syndrome
15. Vitreous touch syndrome
16. Vogt–Koyanagi–Harada disease
17. Von Hippel–Lindau disease
18. Vulvodynia

W[edit]

1. Waardenburg syndrome
2. WAGR syndrome
3. Walker–Warburg syndrome
4. Wallis–Zieff–Goldblatt syndrome
5. Waltman Walter syndrome
6. Warkany syndrome 1
7. Warmblood Fragile Foal Syndrome
8. Wartenberg's Syndrome
9. Waterhouse–Friderichsen syndrome
10. Watson syndrome
11. Weaver syndrome
12. Weber's syndrome
13. Weill–Marchesani syndrome
14. Weismann-Netter–Stuhl syndrome
15. Weissenbacher–Zweymüller syndrome
16. Wellens' syndrome
17. Wende–Bauckus syndrome
18. Werner syndrome
19. Wernicke–Korsakoff syndrome
20. West syndrome
21. Westerhof syndrome
22. Wet lung syndrome in newborn
23. WHIM syndrome
24. White dog shaker syndrome
25. White dot syndromes
26. White spot syndrome
27. White-nose syndrome
28. widower syndrome
29. Wiedemann-Steiner syndrome
30. Wiedemann–Rautenstrauch syndrome
31. Wildervanck syndrome
32. Williams syndrome
33. Williams–Campbell syndrome
34. Wilson's temperature syndrome
35. Wilson–Mikity syndrome
36. Wilson–Turner syndrome
37. Winchester syndrome
38. Winter-over syndrome
39. Wiskott–Aldrich syndrome
40. Wissler's syndrome
41. Withdrawal syndrome
42. Withering abalone syndrome
43. Wobbly hedgehog syndrome
44. Wolcott–Rallison syndrome
45. Wolff–Parkinson–White syndrome
46. Wolfram syndrome
47. Wolf–Hirschhorn syndrome
48. Woodhouse–Sakati syndrome
49. Work-related musculoskeletal disorders
50. Worster-Drought syndrome
51. Worth syndrome
52. Wrinkly skin syndrome

X[edit]

1. X-linked lymphoproliferative disease
2. Xeroderma pigmentosum
3. Xia-Gibbs Syndrome
4. XX male syndrome
5. XXXY syndrome
6. XXYY syndrome
7. XY gonadal dysgenesis
8. XYY syndrome

Y[edit]

1. Yellow nail syndrome
2. Yemenite deaf-blind hypopigmentation syndrome
3. Yentl syndrome
4. Yim–Ebbin syndrome
5. Young's syndrome
6. Young–Madders syndrome
7. Young–Simpson syndrome
8. Yunis–Varon syndrome
9. Yunnan sudden death syndrome

Z[edit]

1. Zadik–Barak–Levin syndrome
2. Zamzam–Sheriff–Phillips syndrome
3. Zechi-Ceide syndrome
4. Zellweger syndrome
5. Zieve's syndrome
6. Zimmermann–Laband syndrome
7. Zollinger–Ellison syndrome
8. Zori–Stalker–Williams syndrome