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Extraosseous Colonic Uptake of 99mTc-MDP Associated With Iodinated Contrast CT

Ng, Thomas S. C., MD, PhD; Sakellis, Christopher G., MD; Jacene, Heather A., MD

doi: 10.1097/RLU.0000000000002506
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Extraosseous 99mTc-MDP uptake on bone scans is frequently encountered and has a broad differential diagnosis. A small subset of such patients can present with intestinal 99mTc-MDP uptake. We present the case of a 35-year-old woman with status after right nephrectomy for renal cell carcinoma, being followed with bone scan for osseous metastases. Follow-up imaging revealed new faint 99mTc-MDP uptake in the right hemiabdomen. Correlation with contrast-enhanced CT localized this uptake to the ascending colon. Enteric 99mTc-MDP uptake and its association with iodinated contrast should be considered in the differential diagnosis of extraosseous enteric 99mTc-MDP uptake.

From the Joint Program in Nuclear Medicine, Department of Radiology, Brigham and Women's Hospital, Boston, MA; and Department of Imaging, Dana-Farber Cancer Institute, Boston, MA.

Received for publication December 7, 2018; revision accepted January 12, 2019.

Conflicts of interest and sources of funding: none declared.

Correspondence to: Thomas S.C. Ng, MD, PhD, Department of Radiology, 75 Francis St, Boston, MA 02111. E-mail: thomas_ng@dfci.harvard.edu.

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