TABLE 3.

Classification of colorectal serrated lesions according to Canadian Paternership Against Cancer (CPAC) Pan-Canadian consensus guidelines

CPAC classification (22)	Polyp type (22)	Qualification regarding dysplasia (22)	Prevalence (5,15)	Distribution (5,15)
Hyperplastic polyps			Very common	Mostly distal
Serrated adenomas/polyps	SSA/P	± dysplasia (low-/high-grade)	Common	Mostly proximal
	TSA	± high-grade dysplasia	Rare	Mostly distal
	Serrated polyp, unclassified*

Adapted from references 5, 15 and 22.

^*Serrated polyps with features indeterminate between types. ± With or without; SSA/P Sessile serrated adenoma/polyp; TSA Traditional serrated polyp