Interesting ImagesVenous Air Embolism Identified by 18F-Fluorocholine Dual-Phase PET/CTCañete-Sánchez, Francisco M. MD∗; Romero Robles, Leonardo G. MD∗; Boulvard Chollet, Xavier L. E. MD∗; Mangas Losada, María MD∗; Colletti, Patrick M. MD, PhD†; Rubello, Domenico MD, PhD‡; Ramírez Lasanta, Rafael MD∗; Delgado Bolton, Roberto C. MD, PhD∗Author Information From the ∗Department of Diagnostic Imaging (Radiology) and Nuclear Medicine, University Hospital San Pedro and Centre for Biomedical Research of La Rioja (CIBIR), Logroño, La Rioja, Spain †Department of Radiology, Keck School of Medicine of USC, Los Angeles, CA ‡Department of Nuclear Medicine and PET Unit, Rovigo Hospital, Rovigo, Italy. Received for publication September 21, 2020; revision accepted September 26, 2020. Conflicts of interest and sources of funding: none declared. Correspondence to: Francisco M. Cañete-Sánchez, MD, University Hospital San Pedro and Centre for Biomedical Research of La Rioja (CIBIR), Calle Piqueras, 98, Logroño 26006, La Rioja, Spain. E-mail: [email protected]; or Roberto C. Delgado Bolton. E-mail: [email protected]. Clinical Nuclear Medicine: February 2021 - Volume 46 - Issue 2 - p 171-172 doi: 10.1097/RLU.0000000000003397 Buy Metrics Abstract A 60-year-old woman with primary hyperparathyroidism with previous nonconclusive imaging studies was referred for 18F-fluorocholine (18F-FCH) PET/CT as part of the preoperative diagnostic imaging workup to localize the adenoma before minimally invasive surgery. 18F-FCH PET/CT with dual time point was performed, acquiring immediately and 60 minutes after 18F-FCH administration. The early images demonstrated possible hyperfunctioning parathyroid tissue in the mediastinum, located in the right upper paratracheal space (region 2R), with an incidental iatrogenic subclavian venous air bubble embolism presenting as high uptake in the early images that disappeared in the late images. No symptomatology was reported during the examination. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.