Liver and intrahepatic bile ducts - nontumor
Infectious (nonviral) disorders
Mycobacteria

Author: Komal Arora, M.D. (see Authors page)

Revised: 3 November 2017, last major update May 2012

Copyright: (c) 2002-2017, PathologyOutlines.com, Inc.

PubMed Search: Mycobacteria[TI] liver[TIAB]

Cite this page: Arora, K. Mycobacteria. PathologyOutlines.com website. http://pathologyoutlines.com/topic/livermycobacteria.html. Accessed December 13th, 2017.
Definition / general
  • Granulomas usually lobular, organisms identified with acid fast stain
Atypical mycobacteria
Definition / general
  • Includes Mycobacterium avium intracellulare complex
  • Noncaseating granulomas


Case reports

Microscopic (histologic) images

Images hosted on other servers:

Noncaseating granuloma of M. avium intracellulare; right: with acid fast stain

M. leprae
Definition / general
  • Liver granulomas present in lepromatous leprosy
  • May cause relapse


Microscopic (histologic) description
  • Large histiocytes ("lepra cells") with clear cytoplasm containing weakly acid fast bacilli


Microscopic (histologic) images

Images hosted on other servers:

Large histiocytes with clear cytoplasm; right: with Fite acid fast stain

M. mucogenicum
Definition / general
  • Member of M. fortuitum chelonae complex; formerly classified as M. chelonae-like
  • Water contaminant in hospitals
  • Rapid growing, rarely present in human infections
  • Culture: smooth, nonpigmented, tan white, undulating edges, rapid growing colonies


Case reports

Gross / microscopic (histologic) images

Images hosted on other servers:

Liver: gross, granulomatous
inflammation and necrosis,
gross culture morphology

M. tuberculosis
Definition / general
  • Caseating granulomas


Microscopic (histologic) images

Images hosted on other servers:

Early noncaseating granuloma