Situs inversus viscerus is a rare condition’. We report on a 30 year old male who presented with a 2 day history of right lower quadrant pain. On examination, there was marked tenderness in the right lower quadrant. The diagnosis of situs inversus was confirmed during surgery. A left-sided appendix was removed through an extended right McBurney incision. Failure to recognize dextrocardia on the chest roentgeno gram and not identifying liver dullness on the left led to an incomplete preoperative diagnosis in this case.