WK 4 L 2 GOOD WEBSITE This young female patient underwent sonography for non-specific pain in the lower abdomen. Ultrasound images of the pelvis show bilateral ovarian cysts which show absence of internal nodules, septae or debris. These findings are typical of follicular cysts of the ovaries. Follicular cysts are functional cysts and are enlarged ovarian follicles that have not ruptured (ovulated). They are usually unilateral.