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

<table>Staging of head and neck carcinomas according to the American Joint Committee on Cancer (AJCC).</table>

Gastroenterology Research and Practice

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Figure 3: Chromoendoscopy to Detect Early Synchronous Second Primary Esophageal Carcinoma in Patients with Squamous Cell Carcinomas of the Head and Neck? 

Figure 3 | Chromoendoscopy to Detect Early Synchronous Second Primary Esophageal Carcinoma in Patients with Squamous Cell Carcinomas of the Head and Neck? 