Table 1.

Diagnostic criteria of SSA/P from Project Research “Potential of Cancerization of Colorectal Serrated Lesions” of Japanese Society for Cancer of the Colon and Rectum

SSAP/P is composed of serrated cryptal epithelium with aberrant compartmentalization, essentially characterized by the architectural abnormalities listed below
If the serrated lesion have more than 2 findings of them, it can be diagnosed as SSA/P
(1)	Crypt dilation
(2)	Irregularly branching crypts
(3)	Horizontally arranged basal crypts (Inverted T- and/or L-shaped crypts)