Interesting ImagesConcurrent Liver and Mesentery Primary Extraosseous Multiple Myeloma on 18F-FDG PET/CTCarnahan, Molly B. MD∗; Larsen, Jeremy T. MD†; Conley, Christopher R. MD‡; Yang, Ming MD∗Author Information From the Departments of ∗Radiology †Hematology/Oncology ‡Laboratory Medicine and Pathology, Mayo Clinic Arizona, Scottsdale, AZ. Received for publication May 19, 2020; revision accepted September 2, 2020. Conflicts of interest and sources of funding: none declared. Correspondence to: Ming Yang, MD, Department of Radiology, Mayo Clinic Arizona, 13400 E Shea Blvd, Scottsdale, AZ 85259. E-mail: [email protected]. Clinical Nuclear Medicine: February 2021 - Volume 46 - Issue 2 - p e100-e102 doi: 10.1097/RLU.0000000000003343 Buy Metrics Abstract Extramedullary multiple myeloma (EMM) is a subset of multiple myeloma with a poor prognosis. We report a rare case with biopsy-proven concurrent liver and mesentery primary EMM at the time of initial staging after serologic diagnosis of multiple myeloma. 18F-FDG PET/CT is valuable in detection of EMM when the patient has no osseous lesions and a negative bone marrow biopsy. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.