title: MR diagnosis of haemorrhagic cystic renal cell carcinoma.
abstract: OBJECTIVE
  We report two cases of cystic renal masses considered indeterminate on sonography and CT, in which haemorrhagic contents were demonstrated on MRI.
  
  
  METHODS
  Spin echo T1-weighted axial and coronal (TR 700 ms; TE 17 ms) and T2-weighted axial (TR 3,000 ms; TE 90 ms) upper abdominal scans were obtained on a 1.5 T MR machine.
  
  
  RESULTS
  Cyst contents were of high signal on both T1- and T2-weighted sequences, indicating internal haemorrhage, which was confirmed at surgery.
  
  
  CONCLUSIONS
  There is a high propensity for haemorrhagic renal masses to mask carcinoma. By distinguishing blood from other contents, MRI had a noninvasive role in diagnosis and further management.
authors.affiliation: Radiology Department, Mater Misericordiae Hospital, Dublin, Ireland.
authors.forename: J G
authors.initials: JG
authors.lastname: Murray
authors.forename: S
authors.initials: S
authors.lastname: Eustace
authors.forename: E
authors.initials: E
authors.lastname: Breatnach
authors.forename: J P
authors.initials: JP
authors.lastname: Stack
mesh_terms: D002292:Carcinoma, Renal Cell / Q000473:pathology*; D005260:Female; D006470:Hemorrhage / Q000473:pathology*; D006801:Humans; D052177:Kidney Diseases, Cystic / Q000000981:diagnostic imaging / Q000473:pathology*; D007680:Kidney Neoplasms / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography