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[Virtual Colonoscopy. Experience in 500 patients].

Patricia Carrascosa1, C Capuñay, R Castiglioni

  • 1Hospital de Gastroenterología Dr. Bonorino Udaondo, Buenos Aires, Argentina. investigacion@diagnosticomaipu.com.ar

Acta Gastroenterologica Latinoamericana
|January 8, 2004
PubMed
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Virtual Colonoscopy (VC) is a feasible and well-tolerated method for colon evaluation. It demonstrates high sensitivity and specificity for detecting elevated colorectal lesions, particularly those 5 mm or larger.

Area of Science:

  • Gastroenterology
  • Radiology
  • Medical Imaging

Background:

  • Colorectal cancer screening is crucial for early detection.
  • Conventional Colonoscopy (CC) is the gold standard but can be invasive.
  • Virtual Colonoscopy (VC) offers a less invasive alternative.

Purpose of the Study:

  • To evaluate the experience and results of Virtual Colonoscopy (VC).
  • To determine the sensitivity and specificity of VC compared to CC.
  • To assess VC's efficacy in detecting colorectal lesions of various sizes.

Main Methods:

  • A prospective blind study involving 500 patients with risk factors for colorectal carcinoma or adenomas.
  • VC performed using helical and multislice CT scanners.
  • Comparison of VC findings with Conventional Colonoscopy (CC) as the gold standard.

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Main Results:

  • VC identified more normal studies (253) than CC (233).
  • Sensitivity and specificity for lesions >= 5 mm were high: 95.6% and 91.4% (5-9 mm), and 100% and 100% (>= 9 mm).
  • Sensitivity and specificity for lesions < 5 mm were 87.8% and 86.9%.

Conclusions:

  • Virtual Colonoscopy (VC) is a feasible and useful method for complete colon evaluation.
  • VC is well-tolerated, complication-free, and highly sensitive/specific for elevated lesions >= 5 mm.