Table 4.

Gastric EC Classification.

Characteristics	EC1	EC2	EC3
Glandular pattern	Regularly arranged glands with consistent pattern	Recognizable glandular structure with more compact arrangement	Distortion and loss of glandular structure
Lumen	Well-preserved lumen	Lumen narrowing (Slit-like)	No recognizable lumen
Nuclei	Uniform pattern of small, round, poorly stained nuclei with homogenous size	Small, round, poorly stained nuclei with pseudostratification	Hyperchromatic, disarranged nuclei with heterogeneity in size and shape, significant swelling of the nuclei = “enlarged nuclear sign”
Expected Histology	Non-neoplastic	Adenoma	Carcinoma

EC: endocytoscopy.