Spleen
Congenital anomalies
Accessory (supernumerary) spleen

Authors: Jaleh Mansouri, M.D. (see Authors page)

Revised: 31 October 2016, last major update October 2012

Copyright: (c) 2003-2016, PathologyOutlines.com, Inc.

PubMed search: accessory spleen[title]
Cite this page: Accessory (supernumerary) spleen. PathologyOutlines.com website. http://pathologyoutlines.com/topic/spleenaccessoryspleen.html. Accessed December 3rd, 2016.
Definition / General
  • Present in 20-33% of autopsies
  • Usually small (up to 4 cm), resembles normal spleen macroscopically and microscopically
  • Near splenic hilum, gastrosplenic ligament, tail of pancreas (Pancreas 2011;40:956)
  • Important to document or find in patients with splenectomy for hematologic disease
  • Intrapancreatic accessory spleen may contain increased fibrous stroma, pancreatic islet tissue, and indistinct border with adjacent pancreatic parenchyma
  • May contain epithelial cysts
  • Rare cases can result in torsion, sometimes presenting with either intermittent abdominal pain or acute abdomen
Case Reports
Micro Images

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Case of the Week #406:

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H&E


CD8

CD56

Chromogranin

Synaptophysin

Differential Diagnosis