title: [Spiral CT in the preoperative staging of colorectal carcinoma-radiologic-pathologic correlation].
abstract: OBJECTIVE
  To evaluate spiral CT (SCT) in the preoperative staging of colorectal carcinomas.
  
  
  METHODS
  Fifty-one patients suspicious of having colorectal carcinoma underwent spiral CT scans performed from the dome of the diaphragm to symphysis pubica after cleansing enema and rectal air insufflation. Fourty-one of the 51 patients were proved to have colorectal carcinoma by colonoscopy and/or pathology. The findings of SCT of 31 patients treated with surgery were compared with the surgical pathological examination for staging.
  
  
  RESULTS
  The overall accuracy rate of SCT staging was 58.1% (18/31). For evaluation of T staging and N staging, the accuracy rates were 84.4% (27/32) and 61.3% (19/31). Sensitivity and specificity for serosal infiltration were 92.9% (26/28) and 50.0%, They were 70.0% (14/20) and 81.8% (9/11) for lymph node involvement.
  
  
  CONCLUSIONS
  SCT scan, playing a significant role in the preoperative staging of colorectal carcinoma, is useful to detect the serosal infiltration, lymph node and distant metastasis.
authors.affiliation: Cancer Institute (Hospital), Chinese Academy of Medical Sciences, Peking Union Medical College. Beijing 100021, China.
authors.forename: Chunwu
authors.initials: C
authors.lastname: Zhou
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: Xinming
authors.initials: X
authors.lastname: Zhao
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015179:Colorectal Neoplasms / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D036542:Tomography, Spiral Computed / Q000379:methods*