Case 77. 

Non-tuberculous mycobacterial infection of lung (22 y-o M)
　 　 　 　
　
Apical lung lesions surgically resected after prolonged chemotherapy
 　
　 　 　 　

　

 　 A few acid-fast bacilli are identified in the cytoplasm of macrophages (Ziehl-Neelsen). M. avium-intracellulare was cultured from the lesion.