title: Transrectal ultrasonography versus computed tomography in staging rectal carcinoma.
abstract: BACKGROUND
  Since therapy of rectal carcinoma depends on the extent of disease, staging becomes important.
  
  
  OBJECTIVE
  To assess the ability of transrectal ultrasonography (TRUS) and computed tomography (CT) to stage rectal carcinoma.
  
  
  METHODS
  Ten patients with rectal carcinoma were examined by TRUS and plain and contrast-enhanced CT scan; their findings were compared with each other and with those at surgery.
  
  
  RESULTS
  TRUS identified wall invasion in all ten cases and perirectal fat infiltration in all five cases in whom these were present. Node involvement was detected in five cases on TRUS and two of six cases on CT. Metastasis to bladder (one case) was not recognized by TRUS but was seen on CT.
  
  
  CONCLUSIONS
  TRUS is inexpensive and superior to CT in staging early rectal carcinoma; limited depth of penetration is its major limitation. CT is useful for the diagnosis of advanced disease.
authors.affiliation: Department of Gastroenterology, Osmania Medical College, Hyderabad.
authors.forename: K N
authors.initials: KN
authors.lastname: Ramana
authors.forename: P V
authors.initials: PV
authors.lastname: Murthy
authors.forename: K P
authors.initials: KP
authors.lastname: Rao
authors.lastname: Bhagawanulu
authors.forename: T
authors.initials: T
authors.lastname: Mandapal
authors.forename: B
authors.initials: B
authors.lastname: Pratap
mesh_terms: D000328:Adult; D000368:Aged; D019160:Endosonography; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D012004:Rectal Neoplasms / Q000473:pathology*; D012007:Rectum / Q000473:pathology; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed