Sacro-iliac osteomyelitis in a 13 year old boy following perforated appendicitis.

Appendicitis is a common cause of acute abdominal pain in children and is treated by an open or laparoscopic appendicectomy. Well documented post-operative complications include wound infection, intra-abdominal collection, and adhesional bowel obstruction. We present the rare case of right sacro-iliitis and iliac bone osteomyelitis in a 13 year old boy following an open appendicectomy for a perforated appendicitis.