Task: Answer Verification
Input (English): Question: Is caspase-3 expression in metastatic lymph nodes of esophageal squamous cell carcinoma prognostic of survival?
Answer: Caspase-3 expression in metastatic LNs may be a potential independent predictor of poorer overall survival in patients with resected ESCC and LN metastasis. Protein expression in metastatic tumors may be a biomarker prognostic of survival.
Output (English): yes