Small bowel (small intestine)
Other malignancies
Kaposi sarcoma


Topic Completed: 1 August 2012

Revised: 15 March 2019

Copyright: 2003-2019, PathologyOutlines.com, Inc.

PubMed Search: Kaposi sarcoma small bowel
Page views in 2018: 234
Page views in 2019 to date: 64
Cite this page: Gulwani H. Kaposi sarcoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/smallbowelkaposi.html. Accessed March 21st, 2019.
Definition / general
  • Present in GI tract in 50% with AIDS, although symptoms in only 10% (diarrhea, protein losing enteropathy, abdominal pain)
Case reports
Gross description
  • Multiple reddish brown or purple nodules, 5 - 15 mm
Gross images

Images hosted on other servers:

Various images

Microscopic (histologic) description
  • Spindle cells that expand lamina propria and obliterate muscularis mucosa, extravasated red blood cells
  • Often submucosal involvement
Microscopic (histologic) images

Images hosted on other servers:

Kaposi sarcoma involving
duodenal lamina propria;
submucosal involvement
is more common

Kaposi sarcoma of stomach, showing characteristic eosinophilic
cytoplasmic inclusions (arrowheads), which may represent
residua of phagocytosed red cells; inclusions are 60%
sensitive for Kaposi sarcoma and relatively specific

Positive stains
Negative stains
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