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

Table 1

Histopathological diagnosis of mucosal biopsies.

Pathology	𝑁
Squamous cell carcinoma	2
High-grade dysplasia	1
Low-grade dysplasia	2
Peptic esophagitis	10
Gastric heterotopic mucosa	2
Hyperplasia	2
Hyperkeratosis	1
Acanthosis	1
Normal mucosa	3
Total	24