Uterine myoma may serve as a false positive source of radioiodine uptake in whole body scintigraphy

Articles in Press

Document Type : Case Report

Authors

Department of Nuclear Medicine, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran

10.22034/irjnm.2025.129972.1673

Abstract

Understanding the occurrence of false positive results for radioactive iodine absorption in whole body scans is crucial for differentiating these cases from actual metastases. The implementation of SPECT/CT technology has significantly facilitated this process for medical professionals. This study presents a case involving a 46-year-old female patient who underwent a total thyroidectomy as a treatment for thyroid cancer (papillary thyroid carcinoma), followed by radioactive iodine therapy. The post-treatment whole body scan revealed the presence of a diffuse radioiodine-avid lesion in the pelvic region, which was later identified as multiple uterine myomas through additional investigations utilizing SPECT/low-dose CT scan and MRI findings.

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References

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Iranian Journal of Nuclear Medicine

Articles in Press, Accepted Manuscript
Available Online from 28 December 2025

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