Geneva, Oct. 15 -- International Clinical Trials Registry received information related to the study (ChiCTR2600134075) titled 'Subsequent Primary Cancers After Esophageal Squamous Cell Carcinoma: Risk Patterns, Multistate Transitions, and Dynamic Risk Stratification in SEER and a Clinical Cohort from a High-Incidence Region in China' on Oct. 10.

Study Type: Observational study

Study Design: Cohort study

Primary Sponsor: Cancer Hospital of Shantou University Medical College

Condition: Second primary cancer in patients with esophageal squamous cell carcinoma

Recruitment Status: Recruiting

Phase: N/A

Date of First Enrollment: 2026-09-05

Target Sample Size: Stratification by history of SPC:3000;

Countries of Recruitment: China...