[Solitary pulmonary nodule due to Mycobacterium intracellulare showing intense uptake on 18F-fluorodeoxyglucose-positron emission tomography].
A 71-year-old woman with no respiratory symptoms, was admitted because of a solitary pulmonary nodule on a chest radiograph. Computed tomography revealed a 2.0 cm nodule with pleural indentation in the right S2. 18F-fluorodeoxyglucose-positron emission (18F-FDG-PET) showed positive tumor uptake (maximum standardized uptake value = 4.8). Bronchoscopy yielded no specific histological or bacterial findings. Lung biopsy using video-associated thoracoscopy revealed an epithelial granuloma with caseation, but no acid-fast bacilli were detected. PCR revealed Mycobacterium intracellulare (M. intracellulare). A solitary nodule caused by M. intracellulare is rare, but it should be considered in the differential diagnosis even with intense uptake on 18F-FDG-PET.
Nakagawa
Naoko
N
Department of Pulmonary Medecine, School of Medicine, Fukushima Medical University.
Tanino
Yoshinori
Y
Inokoshi
Yayoi
Y
Sato
Suguru
S
Ishii
Taeko
T
Saito
Kazue
K
Fukuhara
Atsuro
A
Kanazawa
Kenya
K
Saito
Junpei
J
Ishida
Takashi
T
Munakata
Mitsuru
M
D000368:Aged; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D015270:Mycobacterium avium-intracellulare Infection / Q000000981:diagnostic imaging*; D049268:Positron-Emission Tomography; D003074:Solitary Pulmonary Nodule / Q000000981:diagnostic imaging*
D019788:Fluorodeoxyglucose F18