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Clinical Significance of Pre-treatment Circumferential Tumor Location in Patients With cStage IB-III Esophageal Squamous Cell Cancer.

BACKGROUND/AIM: To determine the clinical significance of pre-treatment circumferential tumor location within the esophageal wall in patients with locally advanced esophageal squamous cell carcinoma who underwent curative resection after neoadjuvant chemotherapy.

PATIENTS AND METHODS: Patients (n=96) with cStage IB-III esophageal squamous cell carcinoma who underwent curative resection after neoadjuvant chemotherapy were categorized into two groups based on the circumferential tumor location within the esophageal wall on diagnostic endoscopy: left or anterior wall group (L/A patients, n=49); right or posterior wall group (R/P patients, n=47). Analyses were conducted to examine the relationship between circumferential tumor location, clinicopathological characteristics, 3-year overall survival (3Y-OS), and 3-year recurrence-free survival (3Y-RFS).

RESULTS: The lymph node status and recurrence rates of mediastinal lymph node metastases were significantly higher in patients with L/A than in patients with R/P. Furthermore, patients with L/A had significantly poorer 3Y-OS and 3Y-RFS than those with R/P. Tumor location within the esophageal wall was identified in multivariate analysis as an independent risk factor for 3Y-RFS (hazard ratio=2.92, 95% confidence interval=1.35-6.32, p=0.0064).

CONCLUSION: Pre-treatment of circumferential tumor located within the esophageal wall may be a useful prognostic factor in patients with cStageIB-III esophageal squamous cell carcinoma who underwent curative resection after neoadjuvant chemotherapy.

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