title: [Multi-slice computed tomography diagnosis of collecting duct carcinoma].
abstract: OBJECTIVE
  To explore the diagnostic features of collecting duct carcinoma (CDC).
  
  
  METHODS
  A total of 7 CDC patients were retrospectively examined by multi-slice computed tomography (MSCT). The relevant diagnostic parameters were assessed.
  
  
  RESULTS
  All lesions were located in renal medulla. Among them, infiltrations extended to renal calyx (n = 3) and cortex (n = 5). There were indistinct boundaries (capsule sign) on enhanced phase (n = 6) and pre-capsule (n = 1). On non-enhanced CT, CDC attenuation was greater than normal renal cortex or medulla (43.8 ± 5.3 vs 37.6 ± 5.1 or 32.6 ± 4.1, P < 0.05). The degree of enhancement was less than normal renal cortex and medulla during all enhanced phases (P < 0.05 or 0.01). Excellent consistency existed between CT appearances of CDC and pathological characteristics.
  
  
  CONCLUSIONS
  Dynamic contrast enhanced-CT can show distinct imaging features of CDC correlated with pathological characteristics so as to allow a better differential diagnosis.
authors.affiliation: Department of Radiology, People' s Hospital of Subei, Yangzhou 225001, China.
authors.forename: Qing-qiang
authors.initials: QQ
authors.lastname: Zhu
authors.forename: Zhong-qiu
authors.initials: ZQ
authors.lastname: Wang
authors.forename: Wen-rong
authors.initials: WR
authors.lastname: Zhu
authors.forename: Jing-tao
authors.initials: JT
authors.lastname: Wu
authors.forename: Shou-an
authors.initials: SA
authors.lastname: Wang
authors.forename: Wen-xin
authors.initials: WX
authors.lastname: Chen
mesh_terms: D000328:Adult; D000368:Aged; D002292:Carcinoma, Renal Cell / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D036542:Tomography, Spiral Computed; D055815:Young Adult