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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

From: An assessment of the diagnostic criteria for sessile serrated adenoma/polyps: SSA/Ps using image processing software analysis for Ki67 immunohistochemistry

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)