Petrosquamous sinus
Details
Identifiers
Latin	sinus petrosquamosus
TA98	A12.3.05.107
TA2	4851
FMA	50777
Anatomical terminology [edit on Wikidata]

The petrosquamous sinus is a fetal vein that generally disappears by birth^[1] and, when present, runs backward along the junction of the squama and petrous portion of the temporal, and opens into the transverse sinus.

References

This article incorporates text in the public domain from page 658 of the 20th edition of Gray's Anatomy (1918)

^ Marsot-Dupuch, K.; Gayet-Delacroix, M.; Elmaleh-Bergès, M.; Bonneville, F.; Lasjaunias, P. (June 2001). "The Petrosquamosal Sinus: CT and MR Findings of a Rare Emissary Vein". American Journal of Neuroradiology. 22 (6): 1186–1193. PMC 7974791. PMID 11415917.

Veins of the head and neck

External jugular

Retromandibular	maxillary pterygoid plexus superficial temporal anterior auricular
Direct	posterior auricular transverse cervical suprascapular anterior jugular jugular venous arch

Internal jugular

Diploic/brain

Cerebral

Superficial:	superior superficial middle inferior inferior anastomotic (Labbé) superior anastomotic (Trolard)
Deep:	great internal basal deep middle superior thalamostriate choroid septal

Cerebellar

Sinuses

To COS	superior sagittal straight inferior sagittal occipital
To CS	sphenoparietal intercavernous superior ophthalmic ethmoidal central retinal nasofrontal vorticose veins inferior ophthalmic
To IJV	sigmoid: transverse petrosquamous superior petrosal inferior petrosal basilar plexus internal auditory veins condylar

Facial/common facial

Direct

Brachiocephalic

Vertebral	occipital occipital emissary suboccipital venous plexus deep cervical
Direct	inferior thyroid inferior laryngeal thymic