title: Miniprobe ultrasonography and gastrointestinal tract stenosis.
abstract: OBJECTIVE
  Malignant and nonmalignant stenosis of the gastrointestinal tract are a significant diagnostic and therapeutic challenge. Malignant stenosis is difficult to stage because the endosonographic catheter cannot be passed through the stricture. The objective of this study was to stage tumoral stenosis using a miniprobe.
  
  
  METHODS
  We evaluated 30 patients (20 men, 10 women, average age 65 years). There were 9 nonmalignant cases and 21 malignant cases of stenosis of the gastrointestinal tract. Of the malignant cases, two were caused by extradigestive neoformations that infiltrated the wall of the digestive tract. Twelve of the remaining 19 cases were treated by surgery (63%). Echoendoscopy was done with a miniprobe through the working channel of the videoendoscope. The TNM classification was used to diagnose extension. The pathology study was used to confirm the final diagnosis after surgery for malignant lesions. Nonmalignant stenosis was confirmed in clinical follow-up.
  
  
  RESULTS
  Sensitivity of the miniprobe in determining stage T and stage N were 83% and 64% respectively.
  
  
  CONCLUSIONS
  Miniprobes provide valuable additional information in the study of stenosis of the digestive tract. Sensitivity is good in classifying tumoral T stage, and acceptable for classifying N stage, and may be improved by using low-frequency miniprobes.
authors.affiliation: Endoscopy Unit, Centro Médico Teknon, Barcelona, Spain.
authors.forename: M J
authors.initials: MJ
authors.lastname: Varas Lorenzo
authors.forename: R
authors.initials: R
authors.lastname: Abad Belando
authors.forename: J C
authors.initials: JC
authors.lastname: Espinós Pérez
authors.forename: J
authors.initials: J
authors.lastname: Turró Homedes
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003251:Constriction, Pathologic; D004067:Digestive System Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D019160:Endosonography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011446:Prospective Studies; D012680:Sensitivity and Specificity