Patent Processus Vaginalis: Cause of Indirect Inguinal Hernia

The processus vaginalis is a peritoneal sac that normally obliterates during fetal development. Patency (failure to close) allows abdominal contents (e.g., intestine) to protrude through the inguinal canal, forming an indirect inguinal hernia.

Patency can be congenital or develop later from increased intra-abdominal pressure or abdominal wall weakness. Understanding this mechanism is key to diagnosing and repairing indirect inguinal hernias.