Abstract
A 54 year-old woman with no subjective symptoms was admitted to our hospital because chest radiograph abnormality became worse. A chest radiograph and a chest computed tomography showed multiple nodules with cavity lesion of left upper lobe and consolidation with cavity lesion of lingular lobe. Fluorine-18-2-fluoro-2-deoxy-D-glucose positron emission tomography (FDG-PET) demonstrated that consolidation of lingular lobe was high-uptake sturucture (max standard uptake value (max SUV) : 10.3). Transbronchial biopsy was performed for consolidation in the left lingular lobe. The biopsy specimen showed epithelial cell granuloma with caseation. A culture of bronchial lavage was positive for Mycobacterium avium (M. avium). We treated her with antituberculosis chemotherapy. After treatment, the area of consolidation in left lingular lobe had decreased FDG uptake (max SUV : 3.9). We considered that FDG-PET was an effective procedure for decision of therapeutic initiation and monitoring of therapeutic response in pulmonary M. avium infection.
