Table 4.

Shows histopathological changes in various forms of NTM infection/disease.

NTM cutaneous lesions	NTM lymphadenitis	NTM lung lesions
*Neutrophil infiltration	**Microabscesses	Three distinct patterns
*Interstitial granuloma	**Ill-defined non-caseating granulomas	(1)Granulomas with variable degrees of necrosis
*Small vessel proliferation	**Few giant cells	(2)Non-caseating epitheloid cell granulomas
*Increased numbers of acid-fast bacilli		(3) Interstitial fibrosis and organizing pneumonia

NTM, non-tuberculous mycobacteria.