Intramuscular hematoma in inner pelvic wall may not be a common problem for orthopaedic surgeons. It may be associated with fractures of pelvic bone, or bleeding tendency from various reasons.Usually these hematomae are managed conservatively because they have no harmful effect to the patient, their position makes it difficult to approach. Furthermore, the diagnosis of the hematomae is not simple, so suspicion is important for its diagnosis.

We experienced one case of delayed intramuscular hematoma in iliacus muscle in a 16-year old boy who had suffered blunt trauma to the pelvic area five weeks before. MRI had a significant role in the diagnosis of the hematoma. After evacuation of the hematoma, the patient recovered to normal status. Concerning about its unusual course and diagnostic significances of MRI, we report this case after reviewing of the Iiteratures.