Obturator internus abscess and superior ramus osteomyelitis: A case report in a pediatric patient

Obturator internus muscle (OIM) abscess associated with pelvic superior ramus osteomyelitis is a rare condition, most often described in children following trauma or strenuous muscular activity. Positive blood cultures, when present, are typically due to <i>Staphylococcus aureus</i>. We report the case of a 12-year-old male who presented to the Emergency Department at Prince Ali Military Hospital, Al-Karak, in March 2024 with fever and right hip pain. Magnetic resonance imaging (MRI) confirmed an OIM abscess with superior ramus osteomyelitis. Culture of drained pus and soft tissue samples grew <i>Staphylococcus aureus</i>. The patient underwent surgical drainage and received intravenous antibiotics, which led to full recovery. This case highlights a rare presentation of OIM abscess with associated pelvic osteomyelitis. Early recognition, timely surgical drainage and debridement, combined with systemic antibiotic therapy, can lead to excellent outcomes.