ABSTRACT
Follicular cyst Lined by granulosa cells, this is the commonest benign ovarian tumour and is most often found incidentally. It results from the non-rupture of a dominant follicle, or the failure of atresia in a non-dominant follicle. A follicular cyst can persist for several menstrual cycles and may achieve a diameter of up to 10 cm. Smaller cysts are more likely to resolve, but may require intervention
Physiological cysts are simply large versions of the cysts which form in the ovary during the normal ovarian cycle. Most are asymptomatic incidental findings at pelvic examination or ultrasound scan. Although they may occur in any premenopausal woman, they are most common in young women. They are an occasional complication of ovulation induction, when
if symptoms develop or if they do not resolve after 8-16 weeks. Occasionally, they may continue to produce oestrogen, causing menstrual disturbances and endometrial hyperplasia.
