Small bowel (small intestine)
Benign tumors and tumor-like conditions
Angiomyolipoma


Topic Completed: 1 May 2010

Revised: 22 August 2019

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

PubMed Search: Angiomyolipoma small bowel

See also: Kidney tumor chapter

Nat Pernick, M.D.
Page views in 2018: 594
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Cite this page: Pernick N. Angiomyolipoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/smallbowelangiomyolipoma.html. Accessed December 16th, 2019.
Definition / general
  • Benign triphasic tumor composed of dysmorphic, thick walled blood vessels, smooth muscle that appears to spin off from vessel walls and mature lipid distended cells
Etiology
Clinical features
Case reports
Prognosis and treatment
Gross images

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Various images

Microscopic (histologic) description
  • Benign triphasic tumor composed of dysmorphic, thick walled blood vessels, smooth muscle that appears to spin off from vessel walls and mature lipid distended cells
  • Tumors occasionally have bizarre epithelioid smooth muscle cells (Int J Surg Pathol 2000;8:67) and possible multinucleation
Microscopic (histologic) images

Images hosted on other servers:

Various images

Negative stains
Differential diagnosis
  • Theoretically broad, encompassing smooth muscle and lipogenic tumors but narrowed when one carefully identifies the components of the tumor; few other tumors are immunoreactive for both smooth muscle and melanocytic markers
  • Leiomyomas and leiomyosarcomas have a prominent smooth muscle component but lack a prominent vascular or adipose component
  • Melanomas have prominent atypia, necrosis and infiltrative borders
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