title: [Pyomyositis].
abstract: A 49 year old man with a palpable femoral tumor was examined by ultrasonography, CT and MRI within five days. Ultrasonography and CT indicated a solid malignant tumor, whereas MRI showed high signal intensity throughout the medial vastus muscle on T2-weighted images and centrally localized areas with low signal intensity on T1-weighted images indicative of pyomyositis. This diagnosis was immediately confirmed at surgery. Prompt diagnosis of pyomyositis is of utmost importance since it can rapidly develop into a life-threatening condition. The present case demonstrates the superiority of MRI in this clinical entity, whereas ultrasonography and CT may be misleading in the early stage.
authors.affiliation: Røntgenafdelingen og ortopaedkirurgisk afdeling, Amtssygehuset i Herlev.
authors.forename: T
authors.initials: T
authors.lastname: Tscherning
authors.forename: G S
authors.initials: GS
authors.lastname: Lausten
authors.forename: H S
authors.initials: HS
authors.lastname: Thomsen
mesh_terms: D003937:Diagnosis, Differential; D005269:Femur; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009220:Myositis / Q000175:diagnosis* / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography