title: Obturator internus pyomyositis presenting as a pararectal abscess.
abstract: This report describes two children who presented with fever, hip pain and a limp, and were subsequently found to have a primary pyomyositis of the obturator internus muscle. A clinical diagnosis of septic arthritis of the hip was made initially, but in both children MRI showed a pararectal abscess, which required incision and drainage. Staphylococcus aureus was cultured from pus from the abscesses and both children made a full recovery subsequently. This report highlights the main features of this unusual entity and emphasises the need for early imaging in the child with an unexplained limp.
authors.affiliation: Royal Hospital for Sick Children, Paediatric Surgery, 9 Sciennes Road, Edinburgh EH9 1LT, UK.
authors.forename: Gillian
authors.initials: G
authors.lastname: Duthie
authors.forename: Caroline
authors.initials: C
authors.lastname: Corry
authors.forename: Fraser
authors.initials: F
authors.lastname: Munro
authors.forename: James
authors.initials: J
authors.lastname: Robb