Struma Ovarii: A Case of Struma Ovarii and Literature Review

ABSTRACT

Struma ovarii is a rare, monodermal and highly specialized teratoma, composed entirely or predominantly (>50%) of thyroid tissue. Presenting symptoms are not specific. Despite containing thyroid tissue, only 5% of struma ovarii have features of hyperthyroidism. Therefore, preoperative diagnosis of struma ovarii is difficult. Recently, the authors experienced a case of struma ovarii found in a young woman who presented with known pelvic mass and dysmenorrhea. A transabdominal ultrasonography and computed tomography detected a 16-cm sized multiloculated mass in pelvic cavity. She underwent laparoscopic unilateral ovarian wedge resection. The final histopathologic diagnosis was struma ovarii of the mature cystic teratoma. Therefore, we report this rare case with a brief review of the literature.