A 17 year-old boy, attending to the emergency department with a continuous right lower quadrant abdominal pain, nausea and vomiting during three days, was reported. The patient had peritonitis signs at the right lower quadrant on phsyical examination, whose laboratory findings were all within the normal values except for leucocytosis. The patient underwent an emergency exploration with Me Burney incision. There was duplication of appendix, one of which was perforated appendicitis, the other was normal. Both appendices were excised in the usual manner. This case was presented because it was a rare anomaly of appendix.
Keywords: ACUTE APPENDICITIS, DUPLICATION OF THE APPENDIX