Lymph nodes - not lymphoma
Infectious / parasitic disorders
Yersinia enterocolitica




Topic Completed: 1 June 2006

Revised: 4 February 2019, last major update June 2006

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PubMed Search: Yersinia enterocolitica lymph nodes

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Cite this page: DePond W. Yersinia enterocolitica. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/lymphnodesyenterocolitica.html. Accessed April 20th, 2019.
Definition / general
  • Clinical picture usually resembles acute appendicitis but laparotomy often shows mesenteric lymphadenitis (Pediatr Surg Int 1998;13:2)
  • Similar to Y. pseudotuberculosis
  • Usually self limited
  • Gram stain: gram negative, polymorphic, coccoid or ovoid mobile bacteria
Diagnosis
  • PCR
  • Cultures
Case reports
Microscopic (histologic) description
  • Capsular thickening and edema
  • Immunoblasts and plasma cells in cortical and paracortical region
  • Large lymphocytes within sinuses, germinal center hyperplasia
  • No granulomas (unlike Y. pseudotuberculosis)
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