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Struma ovarii showing clinical characteristics of ovarian malignancy
  1. S. Y. RIM*,
  2. S. M. KIM* and
  3. H. S. CHOI*
  1. *Department of Obstetrics and Gynecology, College of Medicine, Chonnam National University, Gwangju, Korea
  1. Address correspondence and reprint requests to: Seok Mo Kim, MD, Department of Obstetrics and Gynecology, College of Medicine, Chonnam National University Hospital, 8 Hakdong, Dongku Gwangju, Korea 501-757. Email: seokmo2001{at}yahoo.co.kr

Abstract

Struma ovarii is a rare form of ovarian neoplasm, composed entirely or predominantly of thyroid tissue and generally a benign germ cell tumor of the ovary. Ascites have been reported in approximately 15–20% of all cases. However, the combination of struma ovarii and elevated CA125 has rarely been reported. We experienced a rare case of a postmenopausal woman with benign struma ovarii associated with massive ascites, a complex pelvic mass. There was marked elevation of her CA125 level. The clinical impression was ovarian malignancy. Surgical excision of the ovarian mass induced immediate resolution of the ascites and a normalization of the serum CA125 level. No recurrence of the ascites or of the tumor has been observed during the 10-month follow-up. Struma ovarii can mimic ovarian malignancy clinically, particularly if complex and associated with ascites and an elevated CA125 level.

  • ascites
  • CA125
  • struma ovarii

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