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Inflammatory Pseudotumor of the Lung Identified by 18F-Fluorodeoxyglucose Positron Emission Tomography: A Patient Report Takagi, Yuzo Takagi, Yuzo 30252852 Nakamura, Hiroshige Nakamura, Hiroshige 40419495 Miwa, Ken Miwa, Ken Adachi, Yoshin Fujioka, Shinji 20529416 Haruki, Tomohiro Haruki, Tomohiro Taniguchi, Yuji 60229226 Horie, Yasushi Horie, Yasushi Adachi, Yoshin Fujioka, Shinji Taniguchi, Yuji Yonago Acta medica　編集委員会 18F-fluorodeoxyglucose positron emission tomography lung inflammatory pseudotumor video-assisted thoracic surgery 18F-fluorodeoxyglucose positron emission tomography lung inflammatory pseudotumor video-assisted thoracic surgery The patient was a 71-year-old man with an abnormal shadow on chest X-ray. Computed tomography (CT) of the chest showed a tumor of 38 mm in size in the upper lobe of the left lung S3. A CT-guided lung biopsy was performed, but no malignancy was observed. 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET) revealed a high FDG uptake in the tumor: the maximum and mean values of the standard FDG uptake in the early phase were 7.3 and 5.3, respectively, and those in the latter phase, 8.3 and 5.9, respectively. The hilar and mediastinal lymph nodes also showed positive for high FDG uptakes. We strongly suspected lung cancer, and performed a left upper lobectomy by video-assisted thoracic surgery. The pathological diagnosis was an inflammatory pseudotumor of the lung: it is a rare disease but often requires differentiation from lung cancer. Literature has been few on FDG-PET about inflammatory pseudotumor of the lung. Differentiation of the disease from lung cancer was especially difficult in the present patient, because both lymph nodes and the tumor showed high FDG uptakes. Tottori University Faculty of Medicine 2008-09 eng journal article VoR https://repository.lib.tottori-u.ac.jp/records/5044 Yonago Acta medica. 2008, 51(3), 69-72 AA00892884 13468049 Yonago Acta medica Yonago Acta medica 51 3 69 72 https://repository.lib.tottori-u.ac.jp/record/5044/files/51_069-072.pdf application/pdf 332.5 kB 2009-02-10