Struma ovarii is a rare form of ovarian teratoma composed entirely or mainly of mature thyroid tissue. A 55-year-old woman with persistent hypogastric pain for 4 months was admitted to our hospital. She had undergone resection of struma ovarii 4 years ago. Contrast-enhanced CT shows multiple significantly enhanced nodules scattered in the abdominopelvic cavity. Pathological examination of the nodule in the left pararenal region demonstrated thyroid-like follicular epithelium. Herein, we present the 99m TcO 4 whole-body scintigraphy SPECT/CT findings of a case of struma ovarii with extensive peritoneal implants metastasis. Then, she was treated with total thyroidectomy and 131 I therapy.
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