Interesting ImagesSarcoidosis Mimicking Primary Pulmonary Artery SarcomaMasrani, Abdulrahman MD; Raptis, Demetrios A. MD; Siegel, Barry A. MDAuthor Information From the Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO. Received for publication June 16, 2020; revision accepted September 10, 2020. Conflicts of interest and sources of funding: none declared. Correspondence to: Abdulrahman Masrani, MD, Mallinckrodt Institute of Radiology, Washington University School of Medicine, 510 S Kingshighway Blvd, St Louis, MO 63110. E-mail: [email protected]. Clinical Nuclear Medicine: February 2021 - Volume 46 - Issue 2 - p e129-e130 doi: 10.1097/RLU.0000000000003355 Buy Metrics Abstract A 71-year-old man with coronary artery disease, sarcoid uveitis, and recurrent ventricular tachycardia treated with implantable cardioverter-defibrillator presented with increasing dyspnea for several months. Echocardiography showed a large echogenic mass causing severe narrowing of the proximal main pulmonary artery and a resultant gradient of 65 mm Hg. Ventilation-perfusion scintigraphy showed diffusely decreased perfusion of the left lung and an additional mismatched segmental perfusion defect in the left upper lobe. Cardiac MRI could not be performed because of the implantable cardioverter-defibrillator. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.