← Issue №2/ week of Jul 12, 2026/Endoscopy

Artificial intelligence-assisted detection and optical differentiation of colorectal lesions in Lynch syndrome surveillance (CADLY2): a multicentre, open-label, randomised controlled superiority trial.

From GI Signals issue №2: what this paper found, what it changes, and where it sits against the current standard of care, reviewed by Simon Mathews, MD.

Endoscopy rct · Jul 16, 2026 · Lancet GH · IF 30.9

Artificial intelligence-assisted detection and optical differentiation of colorectal lesions in Lynch syndrome surveillance (CADLY2): a multicentre, open-label, randomised controlled superiority trial.

New evidenceartificial intelligencecolorectal cancer screeningLynch syndromecomputer-aided detection
Clinical takeawayConsider using AI-assisted colonoscopy (e.g., CAD EYE) for Lynch syndrome surveillance to improve adenoma detection, particularly in specialized hereditary cancer centers, acknowledging potential bias from unmasked endoscopists.
What it foundAI-assisted colonoscopy (CAD EYE) increased adenoma detection rate to 28% vs 19% with high-definition white-light (HD-WL) colonoscopy alone in Lynch syndrome surveillance.
ContextThis study provides new evidence supporting AI-assisted colonoscopy in Lynch syndrome surveillance, addressing prior sparse and inconsistent data in this high-risk population. Endoscopists were not masked, and safety outcomes were not detailed.
Reinforcessuggested applicable standard· US Multi-Society Task Force on Colorectal Cancer (Gupta S, et al.), "Recommendations for Follow-Up After Colonoscopy and Polypectomy: A Consensus Update by the US Multi-Society Task Force on Colorectal Cancer," Gastroenterology, 2020

Decision at stakethe use of standard colonoscopy for Lynch syndrome surveillance

After polyp removal, assign the next colonoscopy surveillance interval using USMSTF 2020 based on polyp number, size, and histology (e.g., 1-2 tubular adenomas <10 mm 7-10 years; 3-4 tubular adenomas <10 mm 3-5 years; 5-10 tubular adenomas <10 mm, any adenoma ≥10 mm, or adenoma with tubulovillous/villous histology or high-grade dysplasia 3 years; >10 adenomas 1 year with polyposis evaluation; and for serrated polyps, 1-2 sessile serrated lesions <10 mm 5-10 years, 3-4 sessile serrated lesions <10 mm or a hyperplastic polyp ≥10 mm 3-5 years, and a sessile serrated lesion ≥10 mm or with dysplasia or a traditional serrated adenoma 3 years), and apply the shortest interval indicated when findings are mixed.

From our summary of this standard, unedited — the part the paper bears on. marks omitted text. Our wording, not the guideline's; read the source for its own text.

Our full summary of this standard

After polyp removal, assign the next colonoscopy surveillance interval using USMSTF 2020 based on polyp number, size, and histology (e.g., 1-2 tubular adenomas <10 mm 7-10 years; 3-4 tubular adenomas <10 mm 3-5 years; 5-10 tubular adenomas <10 mm, any adenoma ≥10 mm, or adenoma with tubulovillous/villous histology or high-grade dysplasia 3 years; >10 adenomas 1 year with polyposis evaluation; and for serrated polyps, 1-2 sessile serrated lesions <10 mm 5-10 years, 3-4 sessile serrated lesions <10 mm or a hyperplastic polyp ≥10 mm 3-5 years, and a sessile serrated lesion ≥10 mm or with dysplasia or a traditional serrated adenoma 3 years), and apply the shortest interval indicated when findings are mixed. Confirm complete resection and adequate prep before applying an interval, and use site-check/tumor-board pathways for piecemeal resection and malignant (T1) polyps. Refer for genetic evaluation when Lynch, FAP/AFAP/MAP, or serrated polyposis syndrome criteria are met.

US Multi-Society Task Force on Colorectal Cancer (Gupta S, et al.), "Recommendations for Follow-Up After Colonoscopy and Polypectomy: A Consensus Update by the US Multi-Society Task Force on Colorectal Cancer," Gastroenterology, 2020 · reviewed 2026-07-23 ↗
Hüneburg R … CADLY2 investigators · Lancet Gastroenterology & Hepatology · IF 30.9 · PubMed ↗Permalink
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