Evaluation of magnifying colonoscopy in the diagnosis of serrated polyps

Table 1 Characteristics of the patients and conventional endoscopic findings n (%)

	HPs	TSAs	SSA/Ps
Cases (n)	23	39	50
Age (yr), mean ± SD	58.9 ± 12.8	61.9 ± 13.6	63.7 ± 10.6
Location
Right side of colon	7 (30.4)	8 (20.5)	42 (84.0)
Left side of colon	16 (69.6)	15 (79.5)	8 (16.0)
Morphology
Flat type	7 (30.4)	2 (5.0)	45 (90.0)
Protruded type	16 (69.6)	37 (95.0)	5 (10.0)
Color
NC	8 (34.8)	4 (10.3)	40 (80.0)
RC	15 (65.2)	35 (89.7)	10 (20.0)
Mucin
With	5 (21.7)	7 (17.9)	36 (72.0)
Without	18 (78.3)	32 (82.1)	14 (28.0)
Size (mm), mean ± SD	7.74 ± 3.24	9.89 ± 5.73	13.42 ± 8.62

HPs: Hyperplastic polyps; TSAs: Traditional serrated adenomas; SSA/Ps: Sessile serrated adenoma/polyps; NC: Normal-colored or pale in color of mucosa; RC: Reddish change in color.

Table 2 Comparison of the magnified colonoscopic findings and pathological diagnoses

Pit pattern	n	HPs(n = 23)	TSAs(n = 38)	TSAs + cancer(n = 1)	SSA/Ps +α(n = 47)	SSA/Ps + cancer(n = 3)
Type II	17	14			3
Alone	16	13			3
With IV-S	1	1
Type II-L	15	4	5		6
Alone	10	4	1		5
With IV-S	5		4		1
Type II-O	49	4	4		38	3
Alone	30	3			27
With II-L	9		1		8
With IV-S	7	1	3		3
With VI	3					3
Type IV-S	31	1	29	1
Alone	28	1	27
With II-L	2		2
With VI	1			1

HPs: Hyperplastic polyp; TSAs: Traditional serrated adenoma; SSA/Ps: Sessile serrated adenoma/polyp; SSA/Ps + α: SSA/Ps or SSA/Ps + adenoma, others except serrated lesions.