Endocrinol Metab > Volume 27(3); 2012 > Article
Endocrinology and Metabolism 2012;27(3):227-231.
DOI: https://doi.org/10.3803/EnM.2012.27.3.227    Published online September 19, 2012.
A Case of Incidental Struma Ovarii Confounded with the Metastasis of Papillary Thyroid Cancer.
Young Hee Jung, Sung Min Jung, Jong Min Lee, Yi Sun Jang, In Suk Lee, Jong Ok Kim, Hye Soo Kim
1Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea. drkhs@catholic.ac.kr
2Department of Pathology, The Catholic University of Korea College of Medicine, Seoul, Korea.
Abstract
A focal radioactive iodine uptake in the pelvis of a patient with differentiated thyroid cancer needs differential diagnosis besides bone metastasis. Struma ovarii is a rare monodermal ovarian teratoma composed predominantly of mature thyroid tissue; 5-10% of these tumors are malignant. As diagnosis and surgery of thyroid cancer have increased recently, incidental cases of struma ovarii, after radioactive iodine treatment, were occasionally reported. Rare cases of ovary metastasis of thyroid cancer were also reported. We report a case of benign struma ovarii incidentally found in a patient with papillary thyroid cancer. The patient showed a sustained high level of thyroglobulin and focal radioactive iodine uptake in the right pelvis, confused with distant metastasis, after total thyroidectomy and radioactive iodine treatment.
Key Words: Papillary thyroid cancer, Struma ovarii, Thyroglobulin


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