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Updated: Jun 24, 2026

Computer-Aided Three-Dimensional Visualization in the Treatment of Locally Advanced Thyroid Cancer
Published on: June 9, 2023
Radioiodine therapy for thyroid cancer depicted uterine leiomyoma
Kenji Hirata1, Tohru Shiga, Kanako C Kubota
1Department of Nuclear Medicine, Graduate School of Medicine, Sapporo, Japan. khirata@med.hokudai.ac.jp
Abstract:
A 55-year-old woman underwent radioiodine therapy for papillary carcinoma of the thyroid. Post-therapeutic I-131 scan revealed radioiodine uptake in the pelvic region and in the thyroid bed. CT revealed a huge mass connected to the uterus. The tumor was operated on and histologically proven to be a leiomyoma of the uterus. Some physiological conditions or nonthyroidal diseases can cause false positives in patients with postoperative thyroid cancer. We suggest that uterine leiomyoma might be added to the pitfall list, although the mechanism of I-131 uptake remains unclear.
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