Retrospective Diagnosis of Malignant Struma Ovarii After Discovery of Pulmonary Metastasis.

Objective: Malignant struma ovarii diagnosis is challenging due to its benign histologic appearance and rarity. We present a case of struma ovarii determined malignant after pulmonary metastases were incidentally discovered.

Methods: A 29-year-old female with a history of benign struma ovarii presented to the emergency room with right lower abdominal pain.