Fact-sheet: Nontuberculosis mycobacterial infection of lung
Updated on 06/30/2020 at 8:55 AM
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Definition
Ubiquitous organisms that constitute part of the normal environmental flora
Frequent infections in cases of severe immunosuppression with a CD4 count below 50/mm3
Radiography
Normal in most AIDS patients with disseminated disease and positive sputum cultures
CT
The combination of mild cylindrical bronchiectasis and centrilobular micronodular opacities forming a tree-in-bud pattern, predominating in the middle lobe and lingula, is suggestive of nontuberculosis mycobacterial infection of lung.
Hilar or mediastinal lymphadenopathy, nodules, diffuse pulmonary infiltrates with upper lobe predominance, focal consolidations, and endobronchial masses may be noted.
Ground-glass opacities, peribronchial thickening, and interlobular septal thickening may be found
Differential diagnosis
Pulmonary tuberculosis