title: A case of pulmonary Mycobacterium avium infection in an immunocompetent patient who showed a huge consolidation with a high FDG uptake on PET/CT.
abstract: We encountered a middle-aged afebrile immunocompetent woman with a slight cough. Positron emission tomography (PET)/computed tomography (CT) revealed a broad left upper-lobe consolidation without cavity lesions, small nodules, or bronchiectasis showing a positive fluorodeoxyglucose (FDG) uptake with a maximum standardized uptake value (SUVmax) of 26.9. Percutaneous needle lung biopsy specimens showed caseous granulomas without atypical cells and Mycobacterium avium was cultured from left pleural effusion, which developed after the biopsy. The consolidation significantly decreased following combination chemotherapy for approximately 2 years. Clinicians should remember that pulmonary M. avium infection could result in a large consolidation without other typical radiological findings.
authors.affiliation: First Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan.
authors.forename: Akane
authors.initials: A
authors.lastname: Kato
authors.affiliation: First Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yamamoto
authors.affiliation: First Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan.
authors.forename: Mariko
authors.initials: M
authors.lastname: Ikeda
authors.affiliation: First Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan.
authors.forename: Kazunari
authors.initials: K
authors.lastname: Tateishi
authors.affiliation: First Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan.
authors.forename: Atsuhito
authors.initials: A
authors.lastname: Ushiki
authors.affiliation: First Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan.
authors.forename: Masanori
authors.initials: M
authors.lastname: Yasuo
authors.affiliation: Department of Radiology, Shinshu University School of Medicine, Matsumoto, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kawakami
authors.affiliation: Department of Laboratory Medicine, Shinshu University School of Medicine, Matsumoto, Japan.
authors.forename: Shiho
authors.initials: S
authors.lastname: Asaka
authors.affiliation: Positron Imaging Center, Aizawa Hospital, Matsumoto, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Oguchi
authors.affiliation: First Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Hanaoka
keywords: Angiogram sign; Maximum standardized uptake value (SUVmax); Mycobacterium avium; Positron emission tomography (PET)/computed tomography (CT)