Fig. 1
From: Optical biopsy for esophageal squamous cell neoplasia by using endocytoscopy
Esophageal EC classification. a EC1a (normal) shows regularly arranged large rhomboid-shaped cells. b EC1b (esophagitis) shows blunted edges and more rounded cells. c EC2 (intraepithelial neoplasia) shows an increase in cellular density but still with a recognizable cell structure. d EC3 (squamous cell carcinoma) shows complete loss of cellular structure with a significant increase in cellular density