title: Magnetic resonance imaging of typical polypoid adenomyoma of the uterus in 8 patients: correlation with pathological findings.
abstract: OBJECTIVE
  To study the magnetic resonance imaging findings of typical polypoid adenomyoma and correlate radiological findings with histopathologic findings.
  
  
  METHODS
  Magnetic resonance imaging and histopathologic findings were retrospectively reviewed in 8 patients. The size, location, polyp's shape, and signal intensity of magnetic resonance imaging findings were evaluated.
  
  
  RESULTS
  The polyp's shape of 8 cases is pedunculated in 7 and sessile in 1, and all 8 cases are well circumscribed. Four cases (50%) show an isointense mass relative to the myometrium with small or large hyperintense foci on T1-weighted imaging (T1WI) or T2-weighted imaging (T2WI), reflecting the fascicle of smooth muscle with islands of hemorrhagic endometrial tissue. One case forms a large hemorrhagic cavity, being hyperintense on T1WI and hypointense on T2WI. Three cases (37%) show almost homogeneous isointense or hyperintense mass on T2WI.
  
  
  CONCLUSIONS
  When there is a well-defined polypoid mass protrusion into the uterine endometrial cavity that is isointense relative to the myometrium with small or large foci of high signal on T1WI or T2WI in a premenopausal woman, typical polypoid adenomyoma can be considered in the differential diagnosis.
authors.affiliation: Department of Radiology, Nishi-Kobe Medical Center, Kobe, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Kitajima
authors.forename: Kazufumi
authors.initials: K
authors.lastname: Imanaka
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Kuwata
authors.forename: Kimio
authors.initials: K
authors.lastname: Hashimoto
authors.forename: Kazuro
authors.initials: K
authors.lastname: Sugimura
mesh_terms: D018194:Adenomyoma / Q000473:pathology*; D000328:Adult; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D012189:Retrospective Studies; D014594:Uterine Neoplasms / Q000473:pathology*
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA