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

Author: William D. DePond, M.D. (see Authors page)

Revised: 3 July 2018, last major update June 2006

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

PubMed Search: Mycobacteria atypical lymph nodes[TIAB]

See also: Mycobacterium kansasii
Cite this page: DePond, W.D. Mycobacteria - atypical / other than TB or leprosy. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/lymphnodesatypicalmycobacteria.html. Accessed October 19th, 2018.
Definition / general
Diagnosis
Case reports
Treatment
  • Excision of node
  • Antibiotics
Gross images

Images hosted on other servers:

Central caseation
in node involved
by M. avium
intracellulare

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