Successful treatment of a giant ovarian cyst by levothyroxin in a young adult woman: A case report.

Ovarian cysts are one of the most common gynecologic affections for females. The most effective therapy is surgery, but not for all conditions. An 18-year-old woman was referred to our hospital because of menstruation disorder and abdominal distension. Ultrasound and computer tomography of the abdomen revealed a giant ovarian cyst. Magnetic resonance imaging revealed profound pituitary enlargement. Laboratory studies showed severe hypothyroidism, mild anemia, hyperlipidemia, hyperprolactinemia and an elevated level of cancer antigen-125. Regression of the giant ovarian cyst and pituitary enlargement was observed after a 5-month levothyroxine replacement therapy. Thus, for patients with ovarian cysts, hypothyroidism should be taken into account. Making correct diagnosis would avoid unnecessary surgery.