title: [Multislice spiral computer tomography imaging characteristics of urachus lesions].
abstract: OBJECTIVE
  To analyze the multislice spiral computer tomography (MSCT) manifestations and its value in the diagnosis of urachus lesions.
  
  
  METHODS
  A total of 26 patients with urachus disease diagnosed by pathological examination in our hospital between October 2007 and May 2011 were included in this study. We retrospectively analyzed MSCT images on the size, location, and shape character of the foci, and the image features of Retzius space.
  
  
  RESULTS
  In the group, 12 patients had simple urachal cyst with homogeneous fluid filling the cavity with thin wall in CT scanning; five had infected urachal cyst with thickened and enhanced wall, some patch and strip appearing in Retzius space surrounding the lesion; two had infected urachal sinus, and another 3 had urachus leakage. Four had urachal tumor showing irregular cysticsolid mass over the apex of the bladder with apparent enhancement in contrast imaging, and 2 had calcification. Invasion of the bladder wall was found in 4 patients, extensive invasion of the ileum, rectum, uterus and retroperitoneal lymph nodes was found in 1.
  
  
  CONCLUSIONS
  MSCT scan can demonstrate the location, shape, extent of the lesion as well as the relation with adjacent structures, thereby providing valuable information for the diagnosis and differential diagnosis of urachus lesions.
authors.affiliation: Department of Radiology, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Yang
authors.forename: Shunke
authors.initials: S
authors.lastname: Zhou
authors.forename: Changlian
authors.initials: C
authors.lastname: Tan
authors.forename: Bin
authors.initials: B
authors.lastname: Zhang
authors.forename: Weijun
authors.initials: W
authors.lastname: Situ
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007239:Infections / Q000150:complications; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography; D014496:Urachal Cyst / Q000150:complications / Q000000981:diagnostic imaging*; D014497:Urachus / Q000000981:diagnostic imaging / Q000473:pathology*; D055815:Young Adult