Case 164. 

Non-tuberculous mycobacterial infection of skin (43 y-o M)
       
  Biopsy from a scaling skin nodule on the dorsum of the hand of a tropical fish seller  
       

 

  Histologically, non-caseous epithelioid granuloma is formed in the dermis (HE). Fibrotic scarring is associated. Infection of Mycobacterium marinum was confirmed by PCR analysis.