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Updated: Oct 31, 2025

Bloodless Laparoscopic Partial Splenectomy Assisted by Bipolar Radiofrequency Excision Hemostatic Device
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Retroperitoneal Abdominal Accessory Splenosis.

Hatan Mortada1,2, Hisham Alkhaldi3, Awadh Alqahtani4

  • 1Department of Plastic Surgery and Burn Unit, King Saud Medical City, Riyadh, SAU.

Cureus
|July 1, 2021
PubMed
Summary

Accessory splenosis (AS) is a rare condition where splenic tissue forms abnormally. This case highlights an unusual retroperitoneal accessory splenosis, emphasizing its consideration in abdominopelvic mass diagnoses.

Keywords:
abdominal painaccessory spleenhistopathologylaparoscopyretroperitoneal mass

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Area of Science:

  • Gastroenterology and Hepatology
  • Surgical Pathology
  • Developmental Biology

Background:

  • Accessory splenosis (AS) arises from defective fusion of splenic masses during embryonic development.
  • Typically located near the spleen's hilum or pancreatic tail, AS is uncommon.
  • Retroperitoneal location of AS is exceptionally rare.

Observation:

  • A 39-year-old woman presented with a right abdominopelvic mass.
  • CT scan identified a right retroperitoneal abdominal mass.
  • Surgical exploration and histological analysis confirmed the mass as splenic tissue.

Findings:

  • Histological examination confirmed the retroperitoneal mass as splenic tissue, indicative of accessory splenosis.
  • The case demonstrates an unusual presentation of accessory splenosis in the retroperitoneum.
  • This finding underscores the importance of considering rare diagnoses in clinical practice.

Implications:

  • Retroperitoneal accessory splenosis should be included in the differential diagnosis for abdominopelvic masses.
  • Accurate diagnosis of accessory splenosis is crucial for appropriate patient management.
  • Understanding the embryological basis of AS aids in recognizing its varied presentations.