Accessory (supernumerary) spleen
Reviewer: Jaleh Mansouri, M.D. (see Reviewers page)
Revised: 9 April 2013, last major update October 2012
Copyright: (c) 2003-2013, PathologyOutlines.com, Inc.
- 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
End of Spleen > Congenital anomalies > Accessory (supernumerary) spleen
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