Interesting ImagesRib Plasmacytoma With Unusual Sunburst Periosteal ReactionSingh, Vijay MBBS; Suraj, Ajay Kumar MBBS, MD; Mishra, Vineet MBBS; Ora, Manish MBBS, MD, PDCC; Gambhir, Sanjay MBBS, DNBAuthor Information From the Department of Nuclear Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India. Received for publication November 23, 2019; revision accepted February 16, 2020. Conflicts of interest and sources of funding: none declared. Correspondence to: Manish Ora, MBBS, MD, PDCC, Department of Nuclear Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India. E-mail: email@example.com. Online date: April 23, 2020 Clinical Nuclear Medicine: June 2020 - Volume 45 - Issue 6 - p 461-462 doi: 10.1097/RLU.0000000000003030 Buy Metrics Abstract A 39-year-old man presented with progressive painful swelling on the left chest since 6 months. Examination revealed osseous consistency mass. CT of the thorax suggested mass arising from left fourth rib with intrathoracic and extrathoracic soft tissue components. It had extensive sunburst periosteal reaction consistent with primary malignant bone tumor. True cut biopsy revealed plasmacytoma. Routine hematological, biochemical, and bone marrow examinations were normal. Patient referred for whole-body 18F-FDG PET/CT to look for skeletal and bone marrow lesions. It revealed intensely metabolic left fourth rib lesion with periosteal reaction and no other lesion in the rest of the body. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.