[R1 resection of esophageal carcinoma].

Area of Science:

• Oncology
• Surgical Pathology
• Gastrointestinal Surgery

Background:

• Microscopic residual tumor at resection margins (R1 resection) in esophageal cancer correlates with increased recurrence and morbidity.
• Achieving a complete tumor resection (R0) is paramount for the efficacy of oncologic esophageal resection.
• The prognostic significance of microscopic involvement of the circumferential resection margin (CRM) in esophageal carcinoma, using varying pathological definitions, lacks prospective investigation.

Purpose of the Study:

• To prospectively evaluate the clinical relevance of microscopic tumor involvement at the circumferential resection margin (CRM) in esophageal carcinoma.
• To compare the impact of different pathological definitions of CRM involvement on patient outcomes.
• To inform treatment guidelines regarding the management of R1 resections in esophageal cancer.

Main Methods:

• Prospective cohort study design.
• Detailed pathological analysis of esophageal resection specimens, focusing on the CRM.
• Correlation of CRM status with oncologic outcomes, including recurrence and survival.

Main Results:

• Data on the incidence and prognostic impact of CRM involvement in esophageal cancer will be presented.
• Comparison of outcomes based on different CRM definitions (e.g., British vs. American Society of Pathology) will be detailed.
• The feasibility and outcomes of re-resection strategies for CRM-positive cases will be analyzed.

Conclusions:

• Microscopic CRM involvement is a critical factor influencing outcomes in esophageal cancer surgery.
• Prospective data are essential for refining surgical and adjuvant treatment strategies for R1 resections.
• Findings will guide the application of guidelines, such as the German S3 guideline, for managing R1 esophageal cancer cases.