Small intestine & ampulla
Benign tumors / tumor-like conditions
Neuromuscular and vascular hamartoma of small bowel


Topic Completed: 1 August 2012

Minor changes: 13 March 2019

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PubMed Search: Neuromuscular and vascular hamartoma of small bowel

Hanni Gulwani, M.B.B.S.
Page views in 2019: 449
Page views in 2020 to date: 333
Cite this page: Gulwani H. Neuromuscular and vascular hamartoma of small bowel. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/smallbowelneuromuschamart.html. Accessed August 7th, 2020.
Definition / general
  • Also called small bowel hamartoma
  • Similar to diaphragm disease (annular constrictions causing small bowel obstruction associated with NSAIDs) but without NSAID association (Am J Surg Pathol 1999;23:1414)
Case reports
Gross description
  • Multiple circumferential indentions of serosa corresponding to discrete ridges on mucosal surface
Microscopic (histologic) description
  • Ridges composed of submucosa only, contain proliferating blood vessels surrounded by smooth muscle fibers originating from a frayed muscularis mucosa
  • Variable nerve and ganglionic cells present in fibrous collagenous tissue
  • No / minimal inflammatory infiltrate
Microscopic (histologic) images

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