A Multicenter, Prospective, Open-Label Registry Study of the Utilization of EsoGuard, on Samples Collected Using EsoCheck, in an At-Risk Population Undergoing Standard of Care Screening for, and Management of, Previously Undiagnosed Barrett's Esophagus and/or Esophageal Adenocarcinoma

This is a multicenter, prospective, observational study designed to capture a limited set of data consisting of diagnostic test results and clinical management information on subjects who undergo EC/EG to assess for the presence of BE/EAC. Once sufficient time has elapsed for EsoGuard results to be available, as well as for any subsequent clinical evaluation to have been performed (e.g., upper endoscopy and any initial therapeutic management), study staff will obtain the desired information and record it in an electronic data collection (EDC) system, pertaining to subject demographics, pertinent medical history, and risk factors for BE or EAC as well as (1) information about the EsoCheck cell collection procedure and patient tolerance, (2) EsoGuard test result; (3) initial clinical management including upper endoscopy, if performed, and diagnosis (as determined by the endoscopist and the pathologist assessing any biopsies taken.

For subjects endoscopically confirmed with intestinal metaplasia, dysplasia, or cancer, the registry will collect additional clinical management and/or a therapeutic procedure(s) performed and other mid- to long-term outcomes.

For subjects who are negative for BE/EAC via EsoGuard or negative for BE/EAC via EGD will be offered the option of longer-term follow-up in the form of intermittent wellness checks.

The time point for collecting such information shall be fluid, depending on the time course of care provided subsequent to the EsoGuard result being available. Subject participation duration is dependent on EsoGuard results, physician referral, EGD results (if referred) and participation in long-term follow-up. If EG results are negative and subject is not referred for an EGD, participation could last 1 month. If a subject is confirmed with BE/EAC, participation may continue beyond this minimum for an indefinite period, with no predetermined maximum duration.