A case of Mycobacterium avium complex infection showing solitary pulmonary mass.
We report a case of Mycobacterium avium complex (MAC) infection showing a solitary pulmonary mass. High-resolution computed tomography (CT) revealed a well-defined, lobulated mass (32x25 mm) without calcification, cavitation, or bronchiectasis on the right upper lobe. There were no abnormalities in other sites of the lung even on high-resolution CT. The diagnosis was established by open lung needle biopsy. The patient exhibited a large solitary pulmonary mass caused by MAC infection, suggesting that, although the incidence is rare, MAC infection can show a solitary mass that is radiographically indistinguishable from lung cancer.
Division of Diagnostic Radiology, National Cancer Center Hospital, Tokyo, Japan.
Seiji
S
Yano
Masahiko
M
Kusumoto
Hisao
H
Asamuara
Ryosuke
R
Tsuchiya
Noriyuki
N
Moriyama
D001707:Biopsy, Needle; D003937:Diagnosis, Differential; D006801:Humans; D008171:Lung Diseases / Q000000981:diagnostic imaging / Q000473:pathology*; D008175:Lung Neoplasms / Q000175:diagnosis; D015269:Mycobacterium avium Complex; D015270:Mycobacterium avium-intracellulare Infection / Q000000981:diagnostic imaging / Q000473:pathology*; D011859:Radiography