A Giant Ovarian Cyst in an Adolescent

A 12-year-old postmenarchal girl was admitted for evaluation of a 2-month history of increasing abdominal swelling and constipation. On physical examination, a smooth and firm mass filling all the abdomen was palpable. Ultrasound examination showed a giant cystic mass arising from the pelvis; magnetic resonance imaging (Figure) confirmed the finding. Blood tests and tumor markers (β-human choriogonadotropin, CA 19-9, CA-125, and carcinoembryonic antigen) were all within normal range. Suspecting either an ovarian or a paraovarian or a mesenteric cyst, surgical exploration was performed through an umbilical incision.

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