Background: Whereas a proximal resection margin of 12 cm is recommended for complete resection of esophageal cancer, the extent of distal resection is unclear.
Methods: We examined distal resection margins in a consecutive series of patients who underwent esophagectomy for squamous cell carcinomas (n = 50), primary esophageal adenocarcinomas (n = 100), and adenocarcinomas of the cardia (n = 39), in whom all macroscopic tumor was judged to be completely resected.
Results: Microscopic tumor was found at a 3-cm distal resection margin for one multifocal squamous cell carcinoma. Positive distal resection margins were seen in 12% (12 of 100 patients) of primary esophageal adenocarcinomas (median, 2 cm versus 4 cm if negative; p = 0.002, Wilcoxon) and 28% (11 of 39 patients) of cardia adenocarcinomas (median, 1 cm versus 3 cm if negative; p = 0.02, Wilcoxon). Although pathologic stage was shown to be the only significant predictor of overall survival (Hazard ratio [HR] 1.8; 95% confidence interval 1.2 to 2.6; p = 0.007), there was a trend toward reduced postoperative survival for patients with histologically positive distal resection margins, in particular for patients with cardia adenocarcinomas (median, 15.4 months versus 5.7 months if negative; p = 0.0001).
Conclusions: To achieve consistently negative distal resection margins, we recommend resection of at least 5 cm of macroscopically normal foregut below the distal margin of the primary tumor.
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