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Enchondroma of Tibia as Potential False-positive Finding on 68Ga-DOTATOC PET/CT Scan

Mahajan, Sonia, MD; Bodei, Lisa, MD, PhD; Huicochea Castellanos, Sandra, MD; Grewal, Ravinder K., MD

doi: 10.1097/RLU.0000000000002360
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A 70-year-old man with a history of carcinoid tumor of small bowel was referred for 68Ga-DOTATOC study to evaluate the extent of disease. PET/CT scan revealed known metastatic disease in the liver, with other sites of involvement including pancreas, peritoneum, and bones. In addition, moderately intense uptake was noted in proximal right tibia and further correlation on CT showed metaphyseal lesion with “rings and arcs” calcification suggestive of enchondroma. This case highlights the possibility of overexpression of somatostatin receptors in enchondromas, which has been little explored in literature.

From the Molecular Imaging and Therapy Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY.

Received for publication September 6, 2018; revision accepted September 25, 2018.

Conflicts of interest and sources of funding: This research was funded in part through the NIH/NCI Cancer Center Support Grant P30 CA008748. None declared to all authors.

Correspondence to: Sonia Mahajan, MD, Memorial Sloan Kettering Cancer Center 1250 1st Ave, New York, NY 10065. E-mail: mahajans@mskcc.org.

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