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Synchronous Metastatic Breast Carcinoma and Parathyroid Adenoma on 18F-FDG PET/CT and 99mTc-Sestamibi Imaging

Singh, Harkamal, BS*; Wale, Daniel J., DO†‡; Wong, Ka Kit, MBBS; Gross, Milton D., MD†‡; Viglianti, Benjamin L., MD, PhD†‡

doi: 10.1097/RLU.0000000000002380
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In addition to nuclear cardiac and breast imaging, 99mTc-sestamibi scintigraphy is often used to localize parathyroid adenomas. 18F- fluorodeoxyglucose (FDG) PET is heavily utilized in oncology, although its use in identifying parathyroid adenomas is limited. We describe a case of a 57-year-old woman who underwent parathyroid scintigraphy and 18F-FDG PET/CT in the same week due to hyperparathyroidism and an enlarging breast mass, respectively. A right paratracheal mediastinal mass that otherwise would be suspicious for nodal metastases by CT alone was correctly identified to be an ectopic parathyroid adenoma using a combination of the nuclear medicine studies performed.

From the *University of Michigan Medical School;

Department of Radiology, University of Michigan; and

Nuclear Medicine Service, VA Medical Center, Ann Arbor, MI.

Received for publication August 12, 2018; revision accepted October 6, 2018.

Conflicts of interest and sources of fundings: none declared.

Correspondence to: Daniel J. Wale, DO, 2215 Fuller Rd, D748, Ann Arbor, MI 48105. E-mail: dwale@med.umich.edu.

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