Gastrointestinal stromal tumors in a baboon, a spider monkey, and a chimpanzee and a review of the literature

Y. R. Bommineni, Edward J. Dick, G. B. Hubbard

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Backgroud: Gastrointestinal stromal tumors (GISTs) are believed to originate from the intestinal pacemaker cells (interstitial cells of Cajal) or their progenitor cells. Spontaneous tumors have been reported in dogs, horses, rhesus, and a chimpanzee and they have been produced experimentally in mice and rats. GISTs represent a diagnostic challenge because they cannot be differentiated from non-lymphoid mesenchymal tumors without using human c-kit (CD117) immunohistochemistry. Methods: Three neoplasms were incidental findings at necropsy in the stomachs of a baboon and a spider monkey and in the rectum of a chimpanzee. Results: The GISTs were initially diagnosed grossly and histologically with hematoxylin and eosin as leiomyomas. Immunohistochemical analysis revealed that all three were c-kit (CD117) positive. Conclsusions: These are the first reports of GISTs in the baboon and spider monkey and the second in a chimpanzee. The occurrence of GISTs in non-human primates may provide a unique opportunity to study these tumors.

Original languageEnglish (US)
Pages (from-to)199-203
Number of pages5
JournalJournal of medical primatology
Issue number3
StatePublished - 2009
Externally publishedYes


  • Ateles paniscus
  • Cancer
  • Interstitial cells of Cajal
  • Neoplasm
  • Non-human primate
  • Pan troglodytes
  • Papio anubis

ASJC Scopus subject areas

  • Animal Science and Zoology
  • veterinary(all)


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