Case Report Retroperitoneal Perforation of the Appendix Presenting as a Right Thigh Abscess

License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. A rare case of a retroperitoneal rupture of the appendix is being reported here. A 53-year-old male presented to us with a right sided thigh abscess. There were not any abdominal complaints at presentation. There was continuous discharge after incision and drainage from the thigh. Isolation, in culture, of an enteric bacterium from the pus prompted an evaluation of the gastrointestinal tract as a possible source. AnMRI scan revealed fluid tracking from the right paracolic gutter over the psoas sheath and paraspinal muscle into the thigh. A CT scan revealed the perforation at the base of the appendix into the retroperitoneum. At laparotomy the above findingswere confirmed. A segmental ileocaecal resectionwas done.Thepatientmade an uneventful recovery.The absence of abdominal symptoms at presentation leads to delay in diagnosis in such cases. Nonresolving thigh and groin abscesses should lead to the evaluation of the gastrointestinal tract as origin. Diagnostic clues may also be provided by culture reports what as happened in this case. 1. Background Appendicitis is a very common surgical illness encountered by a surgeon in clinical practice. It has several rare pre-sentations and complications which are widely published.