Spleen
Congenital anomalies
Accessory (supernumerary) spleen


Topic Completed: 1 October 2012

Revised: 18 March 2019

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

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Cite this page: Mansouri J. Accessory (supernumerary) spleen. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/spleenaccessoryspleen.html. Accessed August 19th, 2019.
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
Microscopic (histologic) images

Case of the Week #406

10x

40x

H&E


CD8

CD56

Chromogranin

Synaptophysin

Differential diagnosis
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