Lymph nodes - not lymphoma
Infectious / parasitic disorders
Mycobacteria - atypical / other than TB or leprosy

Topic Completed: 1 June 2006

Revised: 4 February 2019, last major update June 2006

Copyright: (c) 2003-2018,, Inc.

PubMed Search: Mycobacteria atypical lymph nodes[TIAB]

See also: Mycobacterium kansasii

Page views in 2018: 480
Page views in 2019 to date: 856
Cite this page: DePond W. Mycobacteria - atypical / other than TB or leprosy. website. Accessed November 18th, 2019.
Definition / general
Case reports
  • Excision of node
  • Antibiotics
Gross images

Images hosted on other servers:

Central caseation
in node involved
by M. avium

Cervical node involved by M. chelonei

Microscopic (histologic) description
  • Caseating granulomas with suppurative changes
  • Granulomas often ill defined, irregular or serpinginous
  • Often Langhans type giant cells
  • Variable plasma cells and neutrophils
  • Immunosuppressed patients may develop a spindle cell pseudotumor
Microscopic (histologic) images

Images hosted on other servers:

M. avium intracellulare:

Central necrosis and
Langhans giant cells /
inset Ziehl-Neelsen stain
shows irregular rods

Ziehl-Neelsen stain
shows macrophages
stuffed with acid
fast bacilli

Axillary node aspirate in HIV+ infant

M. chelonei:

Caseous granuloma

Positive stains
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