Atypical Mycobacterial Infections

Atypical Mycobacterial Infections

Cary Chisholm, MD

Atypical mycobacterial infection over the dorsal hand presented as an indurated pink nodule image in this patient. The culture was positive for Mycobacterium marinum.

Some atypical mycobacterial infections have a diffuse mixed inflammatory infiltrate with associated necrosis. (Courtesy S. Billings, MD.)



  • Infections with Mycobacterium spp. other than M. leprae and M. tuberculosis



  • Age

    • Affects any age group

  • Gender

    • No gender predilection

  • Ethnicity

    • No specific ethnic predilection

      • More common in developing countries and immunosuppressed


  • Can occur anywhere after bacterial contamination


  • Tender nodules, abscesses, plaques, or ulcers

    • May be solitary or multiple

    • May be superficial, deep, or both

  • Erythema

Only gold members can continue reading. Log In or Register to continue

Stay updated, free articles. Join our Telegram channel

Jul 8, 2016 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Atypical Mycobacterial Infections

Full access? Get Clinical Tree

Get Clinical Tree app for offline access