{Reference Type}: Case Reports {Title}: [De Garengeot hernia - a case report]. {Author}: Tryggvadottir RR;Moller PH;Vidarsdottir H; {Journal}: Laeknabladid {Volume}: 109 {Issue}: 12 {Year}: 2023 Dec {Factor}: 0.524 {DOI}: 10.17992/lbl.2023.12.772 {Abstract}: We report a case of a 79-year-old woman with a previous history of polycythemia vera, glaucoma and hypertension. Her previous surgeries included a cholecystectomy with an incidental finding of a gallbladder carcinoma with following partial liver resection and a hysterectomy. The surgery department was consulted regarding this patient due to abdominal pain in her lower abdomen and tumor in her right groin. A CT scan of the abdomen was obtained that showed a hernia with the appendix vermiformis in the hernia sac. She was operated with a preperitoneal open approach and an inflamed appendix from a femoral hernia sac was removed and a herniorrhaphy with a mesh was performed. The patient was discharged the day after the surgery. Femoral hernia with the appendix in the hernia sac is a rare type of hernia first descriped by Rene-Jacques De Garengeot in 1731 and now bearing his name.