Colorectal Serrated Neoplasia: An Institutional 12-Year Review Highlights the Impact of a Screening Programme

Table 5

Characteristics of SSL/Ps & TSAs identified over a 12-year period at our institution.

Parameter	All SSL/Ps	All TSAs
Number (, %)	520	40
Age of patient (years)
Median	63	67
Range	19-84	34-92
Site (, %)
Right colon	451 (86.7%)	4 (10%)
Left colon	62 (11.9%)	34 (85%)
Colon NOS	7 (1.4%)	2 (5%)
Size (mm)
Median	8	13
Range	1-32	2-60
Size category (, %)
<1 cm	167 (64.5%)	7 (26.9%)
≥1 cm	92 (35.5%)	19 (73.1%)
Dysplasia (, %)
Low	35 (6.7%)	24 (60%)
High	—	3 (7.5%)
Type of dysplasia (, %)
Conventional	25 (71.4%)	26 (65%)
Serrated	3 (8.6%)	1 (2.5%)
Mixed	7 (20%)	—

Abbreviations: SSL/Ps: sessile serrated lesions/polyps; TSAs: traditional serrated adenomas; NOS: not otherwise specified.