Chromoendoscopy to Detect Early Synchronous Second Primary Esophageal Carcinoma in Patients with Squamous Cell Carcinomas of the Head and Neck?

<table>Tumor staging of head and neck cancer according to TNM classification. Stage I: T1N0M0; stage II: T2N0M0; stage III: T3N0M0; stage IV: T4N0-3M0.</table>

Gastroenterology Research and Practice

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Figure 2: Chromoendoscopy to Detect Early Synchronous Second Primary Esophageal Carcinoma in Patients with Squamous Cell Carcinomas of the Head and Neck? 

Figure 2 | Chromoendoscopy to Detect Early Synchronous Second Primary Esophageal Carcinoma in Patients with Squamous Cell Carcinomas of the Head and Neck? 