1. Conclusion: The incidence of SCCHN in our EC patients was 11.4%. Periodic otolaryngological examination and pharyngoscopy screening can detect SCCHNs early in patients with primary EC.
   食道癌患者中头颈部鳞状细胞癌的发病率为11.4%。定期对原发性食道癌患者进行耳鼻喉科检查和咽镜检查可以检出早期头颈部鳞状细胞癌。

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