Interesting ImagesLarge Renal Cysts on Bone Scintigraphy in a Patient With Lower Back PainZhu, Yahua MD*; Geng, Jun MD*; Wang, Haili MD†; Shao, Fuqiang MD†Author Information From the *Department of Nuclear Medicine, The First People's Hospital of Neijiang, Neijiang †Department of Nuclear Medicine, Zigong First People's Hospital, Zigong, Sichuan, People's Republic of China. Received for publication August 30, 2019; revision accepted September 25, 2019. Conflicts of interest and sources of funding: none declared. Correspondence to: Fuqiang Shao, MD, Department of Nuclear Medicine, Zigong First People's Hospital, No. 42, Shangyihao 1st Branch, Ziliujing District, Zigong, Sichuan Province 643000, People's Republic of China. E-mail: firstname.lastname@example.org. Online date: December 11, 2019 Clinical Nuclear Medicine: February 2020 - Volume 45 - Issue 2 - p 168-169 doi: 10.1097/RLU.0000000000002867 Buy Metrics Abstract Bone scintigraphy is often utilized to detect the osseous etiology of lower back pain. Here we report a 70-year-old man with lower back pain who was referred a 99mTc-MDP bone scan to identify possible vertebral compression fracture. The images did not detect any osseous lesion. However, the images revealed photopenic regions in the both kidneys, which were confirmed as renal cysts on the CT images. The patient received laparoscopic unroofing of renal cysts, and his symptoms improved. Our case illustrated that back pain is not always due to osseous etiology, it might be caused by urinary disorder. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.