Interesting ImagesDisseminated Bacillus Calmette-Guérin Infection Detected on FDG PET/CT Following Intravesical Bacillus Calmette-Guérin TherapyCurley, Michael MBBS, FRANZCR∗,†; Bhardwaj, Hemant MBBS, FRANZCR, FRACP∗Author Information From the ∗Queensland X-Ray, Greenslopes Private Hospital, Greenslopes †Faculty of Medicine, University of Queensland, Brisbane, Queensland, Australia. Received for publication December 9, 2019; revision accepted February 16, 2020. Conflicts of interest and sources of funding: none declared. Correspondence to: Michael Curley, MBBS, FRANZCR, Queensland X-Ray, Greenslopes Private Hospital, Newdegate Street, Greenslopes, Queensland 4120, Australia. E-mail: email@example.com. Clinical Nuclear Medicine: July 2020 - Volume 45 - Issue 7 - p e323-e324 doi: 10.1097/RLU.0000000000003046 Buy Metrics Abstract We report the case of a 64-year-old man who presented with back pain, anorexia, and weight loss 9 months following bacillus Calmette-Guérin immunotherapy for high-grade transitional cell carcinoma of the bladder. A FDG PET/CT was performed, which demonstrated osteolysis and intense FDG avidity of the T6/T7 and T8/T9 vertebral endplates. In addition, an aneurysm with FDG-avid soft tissue was present of the distal left common iliac artery. The provisional diagnosis was disseminated bacillus Calmette-Guérin infection, resulting in spondylodiscitis and a mycotic aneurysm. A CT-guided vertebral biopsy confirmed the presence of Mycobacterium tuberculosis DNA on polymerase chain reaction testing. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.