Right splenorenal fusion with associated hypersplenism

Area of Science:

• Anatomical variations
• Embryology
• Surgical pathology

Background:

• Splenorenal fusion is a rare congenital anomaly.
• Splenic fusion anomalies are typically found on the left side.
• This report documents a unique case of splenic fusion with a right-sided retroperitoneal mass.

Observation:

• The patient presented with hypersplenism.
• A right retroperitoneal mass was identified.
• Surgical exploration revealed spleen fusion associated with the mass.

Findings:

• The mass contained a concomitant renal cell carcinoma and multiple adenomas.
• Hypersplenism resolved completely after surgical excision of the mass.
• This is the second reported case of splenorenal fusion and the first with a right retroperitoneal association.

Implications:

• The right-sided occurrence supports theories of spleen cell migration during embryogenesis.
• This case may help explain other splenic fusion anomalies.
• Understanding rare anatomical variations is crucial for surgical planning and diagnosis.