Ovarian fibroma

Ovarian fibroma
Low magnification micrograph of a calcified ovarian fibroma in the context of nevoid basal cell carcinoma syndrome. H&E stain.
Specialty	Gynecology

The ovarian fibroma, also fibroma, is a benign sex cord-stromal tumour.

Ovarian fibromas represent 4% of all ovarian neoplasms.^[1] They tend to occur mostly during perimenopause and postmenopause, the median age having been reported to be about 52 years, and they are rare in children.^[1] Lesions tend to be asymptomatic. If symptoms are present, the most common one is abdominal pain.^[1]

On gross pathology, they are firm and white or tan. On microscopic examination, there are intersecting bundles of spindle cells producing collagen.

There may be thecomatous areas (fibrothecoma). The presence of an ovarian fibroma can cause ovarian torsion in some cases.