ABSTRACT
Pelvic osteomyelitis is rare. We report the case of a 10-year-old boy presented with a five-day history of pyrexia and left painful lameness. Passive range of hip was normal. Initial biological investigations revealed an inflammatory syndrome. Plain radiographs of the pelvis and ultrasound scan of the left hip joint were normal. Bone scintigraphy showed a tracer uptake in the left obturator ring. The blood cultures were positive for methicillin-sensitive staphylococcus aureus. The diagnosis of pelvic osteomyelitis was held. Magnetic Resonance Imaging [MRI] showed a left ischio-pubic ramus osteomyelitis with a subperiostal abscess decompressing into the surrounding tissues. This case history draw attention to the distinctive clinical and bacteriological features of this rare focus of acute hematogenous osteomyelitis and emphasize the MRI interest in the investigation of deep localizations. It may facilitate early recognition of pelvic osteomyelitis in child