title: MR imaging findings of pyogenic bacterial myositis (pyomyositis) in patients with local muscle trauma: illustrative cases.
abstract: Pyogenic myositis (pyomyositis) represents a bacterial infection of muscle, usually caused by Staphylococcus aureus that is endemic in tropical regions. Pyomyositis commonly affects patients who are immunocompromised or who have underlying chronic disorders. Lower extremity localization of infection is typical. The most common pattern of disease, however, appears to be a solitary abscess in the quadriceps musculature. Delay in accurate diagnosis is frequent and clinical deterioration can be precipitous. In view of the high associated morbidity, early imaging to detect, localize, and define disease extent is important. Magnetic resonance imaging (MRI) plays a key role in the definitive diagnosis of pyomyositis. This article provides a pictorial illustration of the spectrum of MRI findings associated with pyogenic myositis.
authors.affiliation: Department of Radiology, School of Medicine, University of California San Diego Medical Center, San Diego, CA, USA. daphne_theodorou@hotmail.com
authors.forename: Stavroula J
authors.initials: SJ
authors.lastname: Theodorou
authors.forename: Daphne J
authors.initials: DJ
authors.lastname: Theodorou
authors.forename: Donald
authors.initials: D
authors.lastname: Resnick
mesh_terms: D000038:Abscess / Q000473:pathology; D000293:Adolescent; D000328:Adult; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D018482:Muscle, Skeletal / Q000382:microbiology / Q000473:pathology*; D052880:Pyomyositis / Q000175:diagnosis* / Q000382:microbiology; D013203:Staphylococcal Infections / Q000175:diagnosis*; D013290:Streptococcal Infections / Q000175:diagnosis