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Pelvic Radioiodine Uptake in a Rectal Wall Teratoma After Thyroidectomy for Papillary Carcinoma

Clinical Endocrinology Branch, National Institute of Diabetes and Digestive and Kidney Diseases, NIH
Nuclear Medicine Department, Warren Grant Magnuson Clinical Center, NIH
Laboratory of Pathology and Surgery Branch, National Cancer Institute, NIH, Bethesda, Maryland
Istituto Medicina Nucleare, II Facolta Di Med. E. Chir., Naples, Italy

Correspondence: For reprints contact: Dr. Jacob Robbins, CEB/NIDDK, NIH, 9000 Rockville Pike, Bethesda, MD 20892.

ABSTRACT

A 30-yr-old woman with previously resected papillary thyroid carcinoma was found to have a pelvic lesion which concentrated radioiodine. By performing simultaneous ¹³¹I whole-body and ^99mTc-methylene diphosphonate bone scans, we found the lesion to be in soft tissue between the sacrum and bladder. Radioiodine therapy was postponed so that the lesion, a benign teratoma of the rectal wall, could be surgically removed. Prior to laparotomy, the patient received a second tracer dose of ¹³¹I so that the lesion could be located at surgery with a hand-held gamma detector. A postoperative whole-body ¹³¹I scan confirmed that the lesion had been removed, thus reducing the absorbed radiation that would have been received by the ovaries during radioiodine therapy. Although the lesion contained both thyroid and gastric epithelium, accumulated ¹³¹I was limited to the area with thyroid follicles.

FOOTNOTES

^* Current address: Departments of Medicine and Physiology and Biophysics, School of Medicine, CWRU.

Disclaimer: The opinions or assertions of this publication are the private views of the authors and are not to be construed as official or reflecting the views of the U.S. Government, nor does mention of trade names or commercial products imply endorsement by the U.S. Government.

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				N Nair, S Basu, and H Pakhale Unusual uptake of radioiodine in the chest in a patient with thyroid carcinoma Br. J. Radiol., January 1, 2004; 77(913): 63 - 67. [Abstract] [Full Text] [PDF]