Demir, YusufUcler, RifkiAlkis, IsmetBulut, Gulay2025-05-102025-05-1020150972-39190974-024410.4103/0972-3919.1640252-s2.0-84941079880https://doi.org/10.4103/0972-3919.164025https://hdl.handle.net/20.500.14720/7685Demir, Yusuf/0000-0001-6762-1977A 30-year-old woman with hyperthyroidism was admitted to hospital. Although increased thyroid function was found, the gland was normal in ultrasonography (USG). Additionally, thyroid iodine uptake and Tc-99m pertechnetate scintigraphy was normal. Abdomen USG detected a cystic pelvic mass in left ovary. A whole-body scan was performed 48 hours after oral ingestion of 29.6 MBq (0.8 mCi) 1-131 (iodine-131) revealed a round structure located to the left lower abdomen. Iodine uptake was detected in this cyst which was compatible with functional thyroid tissue demonstrated by SPECT/CT. The patient was underwent surgical operation and histopathology confirmed mature cystic teratoma. Accurate localization and depiction of thyroid tissue in ovary mass was provided with SPECT/CT.eninfo:eu-repo/semantics/openAccessHyperthyroidismSingle-Photon Emission Computerized Tomography/Computerized TomographyStruma OvariiArticle304N/AQ436436526430330WOS:000440983600020