Piomiositis del músculo piriforme

Abstract

Unfortunately, diagnosis of deep pelvic muscle infection is often delayed since they usually present with non-specific physical signs suggesting other more common diseases. The authors communicate a case of a previously healthy 12-year-old male whot practiced dancing regularly and suffered acute pain in the lumbar and right gluteal regions irradiated to the posterior side of the thigh for 1 week. He initially received symptomatic treatment with no success. He continued with diarrhea, fever and malaise. When he was admitted to hospital he suffered severe septic shock and multi-organ failure. Pelvis magnetic resonance imaging showed pyomyositis of the piriformis muscle. Multi-sensitive Staphylococcus aureus was isolated in blood cultures. Antibacterial treatment and multi systemic support were administered, resulting in a good outcome. Pyomyositis of the piriformis muscle is a rare condition that demands a high index of suspicion to make an adequate diagnosis and prompt treatment, including antibacterial treatment and drainage, particularly in case of abscess formation. This treatment should be established promptly since its outcome may be potentially lethal.