de Garengeot hernia: a unique surgical finding.

Femoral hernias occur in about 3% of all abdominal wall hernias. Herniation of the appendix through a femoral hernia (called de Garengeot hernia) is a much rarer finding, occurring in 0.8% to 1% of all cases. This unique surgical finding is most often found intraoperatively due to the similarities it shares with an irreducible inguinal or femoral hernia that requires emergent surgical intervention. When evaluating a patient with a persistent groin lump, consider de Garengeot hernia in the differential diagnosis.