Scholarlink

Background and Study Aims <p>Size estimation of large (≥ 20&#xa0;mm) colorectal laterally spreading tumors (LSTs) is important in endoscopic decision making and determining risk of incomplete resection and adverse events. Data is lacking on endoscopists’ accuracy in estimating LST size.</p> Patients and Methods <p>We conducted a prospective multicenter video-based study. 46 LSTs were video recorded endoscopically, resected en-bloc and pinned for high-precision measurement prior to formalin fixation. An international group of 24 endoscopists were presented with LST videos and provided an LST size estimate within 10&#xa0;mm categories (20–29&#xa0;mm, 30–39&#xa0;mm, etc.). Correct measurements were defined as an assigned 10&#xa0;mm category containing the true LST size. Primary outcome was accuracy of endoscopists’ LST size estimates, defined as the proportion of correct measurements.</p> Results <p>1104 measurements were performed with an overall accuracy of 27.2% (95% CI 22.1–32.9). 55.6% (95% CI 46.5–64.4) were underestimated and 17.2% (95% CI 12.3–23.6) were overestimated. Accuracy for LSTs &lt; 40&#xa0;mm, ≥ 40&#xa0;mm, ≥ 50&#xa0;mm, and ≥ 60&#xa0;mm was, respectively, 42.2, 19.2, 13.1, and 7.7%. The proportion and magnitude of size underestimation increased with polyp size. Granular mixed LSTs were the most underestimated in size. There were no clinically significant differences in accuracy when stratified by endoscopist sex, ESD volume, and location.</p> Conclusions <p>Visual size estimation of large colorectal LSTs is highly inaccurate, with considerable underestimation. This may result in misjudging the projected resection time, incomplete resection risk, and adverse event risk. Tools to assist endoscopists in measuring large LSTs are needed.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Accuracy of Size Measurement of Large (≥ 2 cm) Colorectal Laterally Spreading Tumours: A Prospective Video-Based Study

  • 期刊论文

  • 发表日期：

    2026年3月8日

查看全文
  • Roupen Djinbachian,
  • Jérémie Jacques,
  • Ludovico Alfarone,
  • Robert Bechara,
  • Nicholas G. Burgess,
  • Mariana Figueiredo,
  • Yusuke Fujiyoshi,
  • Lucile Heroin,
  • Michal F. Kaminski,
  • Eric Lam,
  • Philippe Leclercq,
  • Isabelle Lienhart-Chambon,
  • Alexandru Lupu,
  • Edgard Medawar,
  • Charles Menard,
  • Jeffrey Mosko,
  • Nima Mottacki,
  • Heiko Pohl,
  • Douglas K. Rex,
  • Enrique Rodriguez De Santiago,
  • Yutaka Saito,
  • Amrita Sethi,
  • Sandro Sferazza,
  • Neal Shahidi,
  • Daniel von Renteln,
  • Dennis Yang,
  • Victoire Michal,
  • Mathieu Pioche

摘要

Background and Study Aims

Size estimation of large (≥ 20 mm) colorectal laterally spreading tumors (LSTs) is important in endoscopic decision making and determining risk of incomplete resection and adverse events. Data is lacking on endoscopists’ accuracy in estimating LST size.

Patients and Methods

We conducted a prospective multicenter video-based study. 46 LSTs were video recorded endoscopically, resected en-bloc and pinned for high-precision measurement prior to formalin fixation. An international group of 24 endoscopists were presented with LST videos and provided an LST size estimate within 10 mm categories (20–29 mm, 30–39 mm, etc.). Correct measurements were defined as an assigned 10 mm category containing the true LST size. Primary outcome was accuracy of endoscopists’ LST size estimates, defined as the proportion of correct measurements.

Results

1104 measurements were performed with an overall accuracy of 27.2% (95% CI 22.1–32.9). 55.6% (95% CI 46.5–64.4) were underestimated and 17.2% (95% CI 12.3–23.6) were overestimated. Accuracy for LSTs < 40 mm, ≥ 40 mm, ≥ 50 mm, and ≥ 60 mm was, respectively, 42.2, 19.2, 13.1, and 7.7%. The proportion and magnitude of size underestimation increased with polyp size. Granular mixed LSTs were the most underestimated in size. There were no clinically significant differences in accuracy when stratified by endoscopist sex, ESD volume, and location.

Conclusions

Visual size estimation of large colorectal LSTs is highly inaccurate, with considerable underestimation. This may result in misjudging the projected resection time, incomplete resection risk, and adverse event risk. Tools to assist endoscopists in measuring large LSTs are needed.