The hard fibroma (fibroma durum) consists of many fibres and few cells, e.g. in skin it is called dermatofibroma (fibroma simplex or nodulus cutaneous).[2] A special form is the keloid, which derives from hyperplastic growth of scars.
Soft fibroma
The soft fibroma (fibroma molle) or fibroma with a shaft (acrochordon, skin tag, fibroma pendulans) consist of many loosely connected cells and less fibroid tissue.[3] It mostly appears at the neck, armpits or groin. The photo shows a soft fibroma of the eyelid.
Other types of fibroma
The fibroma cavernosum or angiofibroma, consists of many often dilated vessels, it is a vasoactive tumor occurring almost exclusively in adolescent males.
The cystic fibroma (fibroma cysticum) has central softening or dilated lymphatic vessels.
The myxofibroma (fibroma myxomatodes) is produced by liquefaction of the underlying soft tissue.
The cemento-ossifying fibroma is hard and fibrous, most frequently seen in the jaw or mouth, sometimes in connection with a fracture or another type of injury.
There may be thecomatous areas (fibrothecoma). The presence of an ovarian fibroma can cause ovarian torsion in some cases.
Treatment
Benign fibromas may, but need not, be removed. Removal is usually a brief outpatient procedure or using cryotherapy in which the lesion is deep frozen (-196 degrees Celsius using liquid nitrogen) and thawed for two or more cycles, with full recovery within 3 to 4 weeks. The cryotherapy treatment needs no anesthetics and is painless. Another simple treatment is snip removal after injecting local anesthetic.
^Van Peenen, H.J. (1966). Essentials of Pathology. Year Book Medical Publishers. p. 201. Retrieved 30 May 2021. The fibroma is a benign tumor, frequently found in fascia and subcutaneous tissue. As is true of most benign tumors, it is composed of cells of fairly normal appearance — in this case, fibroblasts.
