follicular cyst
Last reviewed 01/2018
A follicular cyst arises when an ovarian follicle fails to rupture in the course of follicular development and ovulation. It is thin-walled, lined by one or more layers of granulosa cell, and filled with clear fluid.
They are common, usually asymptomatic, unilocular, and rarely, larger than 6 to 8 cm in diameter. Multiple cysts may be seen in heavy bleeding associated with endometrial hyperplasia.
Follicular cysts generally regress during the subsequent menstrual cycle. Laparotomy is indicated if the cyst persists or increases in size during this period.