title: Obturator externus pyomyositis.
abstract: Pyomyositis of the obturator externus muscle is a rare cause of limp and hip pain in children. The exact etiology of the condition remains poorly understood, although a mechanism of transient bacteremia in association with increased muscle susceptibility has been proposed. This case describes the course of a rather than 1 child from presentation to diagnosis and demonstrates the requirement for magnetic resonance imaging in establishing a diagnosis.
authors.affiliation: From the Departments of *Emergency Medicine, †Radiology, and ‡Orthopaedic Surgery, Bristol Royal Hospital for Children, Bristol, United Kingdom.
authors.forename: Timothy
authors.initials: T
authors.lastname: Slade
authors.forename: Robert
authors.initials: R
authors.lastname: Hawkes
authors.forename: Guy
authors.initials: G
authors.lastname: Atherton
authors.forename: Nicholas
authors.initials: N
authors.lastname: Sargant
mesh_terms: D002648:Child; D057210:Delayed Diagnosis; D003937:Diagnosis, Differential; D006615:Hip / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D018482:Muscle, Skeletal / Q000473:pathology*; D010146:Pain / Q000209:etiology; D010384:Pelvic Bones / Q000473:pathology*; D052880:Pyomyositis / Q000150:complications / Q000175:diagnosis*