Serial CT findings of Mycobacterium massiliense pulmonary disease compared with Mycobacterium abscessus disease after treatment with antibiotic therapy

Radiology
Hyun Su KimJoonghyun Ahn

Abstract

To present the serial computed tomographic (CT) findings of lung abnormalities in Mycobacterium massiliense pulmonary disease compared with those in Mycobacterium abscessus disease. The institutional review board approved this retrospective study and waived informed consent. Serial chest CT scans of M massiliense (n = 34) and M abscessus (n = 24) pulmonary diseases were retrospectively reviewed. Patients were treated with clarithromycin-containing combination antibiotics regimen, and sputum examinations were performed regularly. CT scans were obtained at the beginning of antibiotic therapy, at the end of 4-week hospitalization, and at the time of 12-month antibiotic therapy. All patients with M massiliense disease had sputum conversion during treatment, whereas 50% of patients with M abscessus disease had sputum conversion. The most common CT findings of M massiliense disease at presentation were cellular bronchiolitis (n = 34, 100%), bronchiectasis (n = 34, 100%), consolidation (n = 33, 97%), nodules (n = 32, 94%), and cavities (n = 15, 44%). These findings were similar in M abscessus disease. Thirty (88%) patients with M massiliense disease had decrease in overall CT score at 12-month therapy, whereas only eight (33%) patient...Continue Reading

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