Abstract
Background: Benign retroperitoneal cysts are uncommon. There is a paucity of literature on primary upper abdominal retroperitoneal cysts of urothelial histogenesis. We report an uncommon presentation of urothelial cyst clinically mimicking a hepatic cyst. Case presentation: A 21-year old female patient was admitted with intermittent abdominal pain of 9 months duration diagnosed on radiology as a right hepatic cyst. Laparoscopic resection and pathologic examination revealed a primary retroperitoneal cyst with a urothelial histogenesis. This is an unusual clinical presentation of a rare lesion mimicking a hepatic cyst. Conclusion: This case highlights the unusual anatomic location and the rare occurrence of an upper abdominal retroperitoneal urothelial cyst.
Highlights
There is a paucity of literature on primary upper abdominal retroperitoneal cysts of urothelial histogenesis
We report an uncommon presentation of urothelial cyst clinically mimicking a hepatic cyst
Case presentation: A 21-year old female patient was admitted with intermittent abdominal pain of 9 months duration diagnosed on radiology as a right hepatic cyst
Summary
The retroperitoneum is home to a wide range of pathologic entities. Benign retroperitoneal cysts are uncommon, with a reported average incidence of one in 10500 patients [1]. We report an unusual occurrence of a retroperitoneal cyst in a young woman who presented with abdominal pain and underwent surgical resection. The cyst was located entirely in the retroperitoneum, hidden under but not connected to the right lobe of the liver, and completely separated from the other abdominal viscera. The macroscopic examination of the specimen revealed a 6.0 x 5.0 x 0.6 cm purple cystic structure in a collapsed state. It had a partly hemorrhagic but smooth inner lining, with patchy areas of calcification. The inner lining consisted of a stratified benign-appearing epithelium (Figures 2a & 2b).
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