TY - JOUR ID - 18443 TI - Diffuse FDG uptake in the bilateral lungs: hypersensitivity pneumonitis supported by low-dose CT findings JO - Asia Oceania Journal of Nuclear Medicine and Biology JA - AOJNMB LA - en SN - 2322-5718 AU - Goto, Shun AU - Matsusaka, Yohji AU - Yamane, Tomohiko AU - Hoshino, Yuki AU - Kuji, Ichiei AD - Department of Nuclear Medicine, Saitama Medical University International Medical Center, Saitama, Japan AD - Department of Respiratory Medicine, Saitama Medical University Hospital, Saitama, Japan Y1 - 2022 PY - 2022 VL - 10 IS - 1 SP - 43 EP - 46 KW - 18F-fluorodeoxyglucose KW - hypersensitivity pneumonitis KW - low-dose computed tomography KW - Positron Emission Tomography DO - 10.22038/aojnmb.2021.56000.1393 N2 - Hypersensitivity pneumonitis (HP) is an interstitial lung disease resulting from an immune-mediated response in susceptible and sensitized individuals to various inhaled antigens in the environment. Imaging diagnosis is usually based on high-resolution CT findings. Here, we present a 49-year-old man with a history of diffuse large B-cell lymphoma presented with fever and occasional cough. 18F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) revealed diffuse FDG uptake in the bilateral lungs. Expiratory low-dose CT simultaneously performed in PET scanning revealed centrilobular nodules and air trapping in ground glass opacities (GGO). Our imaging diagnosis was acute hypersensitivity pneumonitis (HP). Based on the results of his clinical course, blood laboratory tests, and bronchoscopy, he was diagnosed with acute HP. Diffuse pulmonary FDG uptake can be seen in the patients with acute HP. In addition, expiratory low-dose CT findings of centrilobular nodules and air trapping in GGO may be helpful for accurate diagnosis of acute HP. UR - https://aojnmb.mums.ac.ir/article_18443.html L1 - https://aojnmb.mums.ac.ir/article_18443_e2319de95314dae3edce3d2bf0a5eabf.pdf ER -