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New Decision Modeling Study Demonstrates TissueCypher® Significantly Improves Risk-Aligned Management for Patients with Barrett's Esophagus

$CSTLPress releaseSep 15, 2026, 7:00 AM ETRead the release

Castle Biosciences announced publication of a decision modeling study in the Annals of Gastroenterology showing its TissueCypher Barrett's Esophagus test significantly improves risk-aligned management across non-dysplastic, indefinite, and low-grade dysplasia BE patients. Across 699 pooled patients, adding TissueCypher to clinical decision-making raised appropriate management from 59.8% to 75.3%, and in non-dysplastic BE patients who later progressed to high-grade dysplasia or cancer, appropriate escalation nearly doubled from 30.4% to 56.9%. Among all non-progressors, the model projected a 41.7% reduction in overtreatment.

Key figures

Drug Name
TissueCypher Barrett's Esophagus test (TSP-9)
Pooled patients
699
Validation studies
5
Overtreatment reduction
41.7%
Undertreatment reduction
31.9%
Peer reviewed publications
more than 17
Cumulative patients studied
more than 8,000
Progressor escalation change
50.5% to 66.3% (P=0.008)
Appropriate management change
59.8% to 75.3% (P<0.001)
Ndebe progressor escalation change
30.4% to 56.9% (P=0.001)
Ndebe share of us surveillance patients
approximately 89%

AI analysis

Red flags2 · Pro

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    CSTL: New Decision Modeling Study Demonstrates TissueCypher® Significantly Improves Risk-Aligned Management for Patients with Barrett's Esophagus — AI Analysis | Signal8