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Small bowel (small intestine)

Benign tumors and tumor-like conditions

Neuromuscular and vascular hamartoma of small bowel


Reviewer: Hanni Gulwani, M.D. (see Reviewers page)
Revised: 22 December 2012, last major update August 2012
Copyright: (c) 2003-2012, PathologyOutlines.com, Inc.

General
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● 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
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● 32 year old man with obstruction (J Lab Physicians 2010;2:109)
● Neuromuscular and vascular hamartoma arising in a Meckel's diverticulum (Pathology 2006;38:173)

Gross description
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● Multiple circumferential indentions of serosa corresponding to discrete ridges on mucosal surface

Micro description
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● 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

Micro images
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Various images

End of Small bowel (small intestine) > Benign tumors and tumor-like conditions > Neuromuscular and vascular hamartoma of small bowel


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