title: MR imaging findings of uterine pyomyoma: radiologic-pathologic correlation.
abstract: A 69-year-old postmenopausal female with a spontaneously occurring uterine pyomyoma was described with emphasis on the MR imaging findings. On unenhanced T1- and T2-weighted MR images, a huge mottled mass suspected to contain blood products, necrotic tissue, or purulent or viscous fluid was demonstrated within anterior myometrial wall of uterine body. The mass was surrounded by a peripheral rim that was hyperintense on T1-weighted images and hypointense on T2-weighted images. On gadolinium-enhanced MR images, most of the mass was unenhanced, but the peripheral rim was equally enhanced with the surrounding myometrium. Pathological examination revealed an intramural uterine pyomyoma surrounded by fibrous capsules with abundant lymphocytes and neutrophils. Our findings indicate that pyomyoma should be considered when MR images demonstrate a myometrial cystic lesion accompanied by a peripheral rim.
authors.affiliation: Department of Radiology, Gifu University School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan, hiromi11_br@yahoo.co.jp.
authors.forename: Hiromi
authors.initials: H
authors.lastname: Ono
authors.forename: Masayuki
authors.initials: M
authors.lastname: Kanematsu
authors.forename: Hiroki
authors.initials: H
authors.lastname: Kato
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Toyoki
authors.forename: Yoh
authors.initials: Y
authors.lastname: Hayasaki
authors.forename: Tatsuro
authors.initials: T
authors.lastname: Furui
authors.forename: Ken-ichirou
authors.initials: K
authors.lastname: Morishige
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Hatano
mesh_terms: D000368:Aged; D003287:Contrast Media; D003937:Diagnosis, Differential; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D007047:Hysterosalpingography; D007089:Image Enhancement; D007889:Leiomyoma / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D009215:Myometrium / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed; D014594:Uterine Neoplasms / Q000175:diagnosis*; D014599:Uterus / Q000473:pathology*
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA