Lymph nodes & spleen, nonlymphoid
Lymph nodes-infectious / parasitic disorders

Topic Completed: 1 June 2006

Minor changes: 14 August 2020

Copyright: 2003-2020,, Inc.

PubMed Search: Syphilis lymph nodes

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Page views in 2020 to date: 1,192
Cite this page: DePond W. Syphilis. website. Accessed October 26th, 2020.
Definition / general
  • Due to Treponema pallidum
Primary syphilis
Definition / general
  • Solitary inguinal lymphadenopathy associated with syphilitic chancre


Microscopic (histologic) description
  • Capsular and pericapsular fibrosis, follicular hyperplasia, diffuse interfollicular plasma cells, prominent endarteritis outside the capsule
  • Noncaseating granulomas and abscesses are rare
  • Spirochetes easiest to identify within blood vessel walls

Microscopic (histologic) images

AFIP images

Luetic (syphilitic) lymphadenopathy

Contributed by Mark R. Wick, M.D.

Syphilis lymphadenitis

Positive stains
Secondary syphilis
Microscopic (histologic) description
  • Follicular hyperplasia
Tertiary syphilis
Definition / general
  • Localized lymph node enlargement
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