Endoscopic ultrasonography of superficial esophageal cancers using a thin ultrasound probe system equipped with switchable radial and linear scanning modes

Gastrointest Endosc. 1996 Nov;44(5):578-82. doi: 10.1016/s0016-5107(96)70012-3.


Background: Detailed information on the depth of invasion of superficial esophageal cancer is required for endoscopic mucosal resection. As a pretherapeutic diagnostic procedure, endoscopic ultrasonography using conventional 7.5 MHz systems has been ineffective at providing sufficient details. A newly developed, thin ultrasound probe system provides both radial and linear scanning for evaluation of superficial esophageal cancer.

Methods: Endoscopic ultrasonography was performed in 16 patients using a switchable probe driven at 20 MHz. Seventeen lesions of superficial esophageal cancer were evaluated for depth of invasion to discriminate mucosal from submucosal penetration.

Results: The overall accuracy of staging was 64.7%. In all six errors, mucosal cancers were overstaged as submucosal invasion. The diagnostic accuracy was 80% when the muscularis mucosae was visualized.

Conclusion: A 20 MHz linear-radial switchable probe is a useful new method in the staging of superficial esophageal cancer.

MeSH terms

  • Aged
  • Endosonography / instrumentation*
  • Endosonography / standards
  • Esophageal Neoplasms / diagnostic imaging*
  • Female
  • Humans
  • Male
  • Middle Aged
  • Mucous Membrane / diagnostic imaging
  • Mucous Membrane / pathology
  • Neoplasm Invasiveness / diagnostic imaging
  • Neoplasm Staging / methods