Colon Visualization on Bone Scan Due to Recto-abscess Fistula From Urinoma

The accumulation of the bone-seeking agent in the bowel during a bone scan is rare. A 68-year-old man with colon cancer underwent bone scintigraphy for staging. Whole-body images revealed an abnormal accumulation of hot radioactivity in the abdominal cavity and the colon. Abdominal CT showed a recto-abscess fistula between the rectum and the urinoma. Incidental visualization of colonic radioactivity suggested the presence of a fistula between the bowel and the urinoma, explaining the peculiar finding of the bone-seeking agent in the bowel. Received for publication September 28, 2018; revision accepted November 20, 2018. Conflicts of interest and sources of funding: none declared. Correspondence to: Sheng-Pin Changlai, MD, PhD, Department of Nuclear Medicine, Landseed Hospital, No.77 Guangtai Road, Pingzhen District, Taoyuan City, Taiwan, Republic of China. E-mail: changlaisp@landseed.com.tw. Copyright © 2019 Wolters Kluwer Health, Inc. All rights reserved.

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