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

Table 4

Characteristics of TSAs identified over a 12-year period at our institution; .

Parameter	All TSAs	TSAs without dysplasia	TSAs with dysplasia
Number (, %)	40	13 (32.5%)	27 (67.5%)
Age of patient (years)
Median	67	61	68
Range	34-92	34-86	44-92
Site (, %)
Right colon	4 (10%)	2 (15.4%)	2 (7.4%)
Left colon	34 (85%)	9 (69.2%)	25 (92.6%)
Colon NOS	2 (5%)	2 (15.4%)	—
Size (mm)
Median	13	10	23.2
Range	2-60	2-20	4-60
Size category (, %)
<1 cm	7 (26.9%)	4 (44.4%)	3 (17.6%)
≥1 cm	19 (73.1%)	5 (55.6%)	14 (82.4%)
Dysplasia grade (, %)
Low	24 (60%)	N/A	24 (88.9%)
High	3 (7.5%)	N/A	3 (11.1%)
Type of dysplasia (, %)
Conventional	26 (65%)	N/A	26 (96.3%)
Serrated	1 (2.5%)	N/A	1 (3.7%)

Abbreviations: TSAs: traditional serrated adenomas; NOS: not otherwise specified; N/A: not applicable.