Case 77.

Non-tuberculous mycobacterial infection of lung (22 y-o M)

　 　 　 　
　
Apical lung lesions surgically resected after prolonged chemotherapy
 　
　 　 　 　

　

 　 Histologically, caseous necrosis and epithelioid granulomatous reaction with Langhans-type giant cells are observed, being totally indistinguishable from tuberculosis (HE).