Small bowel (small intestine)
Other malignancies
Kaposi sarcoma

Author: Hanni Gulwani, M.D. (see Authors page)

Revised: 23 February 2018, last major update August 2012

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

PubMed Search: Kaposi sarcoma small bowel

Cite this page: Gulwani, H. Kaposi sarcoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/smallbowelkaposi.html. Accessed July 15th, 2018.
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