Influence of SCENIC recommendations on terminology used for histopathologic diagnosis of inflammatory bowel disease-associated dysplasia

Table 2 Comparison of comments on histopathologic diagnoses of polypoid adenomatous/dysplastic lesions detected in ulcerative colitis patients during surveillance colonoscopies between pre-SCENIC (2012-2014) and post-SCENIC (2016-2018) periods

Histopathologic diagnosis	No. of cases (%)	Comment
		No. of cases	Favor sporadic adenoma	Favor DALM	Cannot distinguish
Pre-SCENIC
TA	32 (53.3)	6	5		1
TVA	2 (3.3)	0
TA with focal HGD	2 (3.3)	0
Adenomatous change/LGD	2 (3.3)	2		1	1
Adenomatous change with focal HGD	1 (1.7)	1		1
LGD	14 (23.3)	10	4	1	5
Polypoid LGD	1 (1.7)	1			1
LGD with tubulovillous features	2 (3.3)	2		1	1
HGD	2 (3.3)	0
DALM	1 (1.7)	1		1
Combined serrated and low-grade adenomatous features	1 (1.7)	0
Total	60 (100)	23	9	5	9
Post-SCENIC
TA	80 (76.9)	4	4
TVA	17 (16.3)	0
TVA with focal HGD	2 (1.9)	0
VA	2 (1.9)	0
LGD	1 (1.0)	1			1
LGD with focal HGD	1 (1.0)	1			1
HGD	1 (1.0)	0
Total	104 (100)	6	4	0	2

SCENIC: Surveillance for Colorectal Endoscopic Neoplasia Detection and Management in Inflammatory Bowel Disease Patients; UC: Ulcerative colitis; DALM: Dysplasia-associated lesion or mass; TA: Tubular adenoma; TVA: Tubulovillous adenoma; VA: Villous adenoma; LGD: Low-grade dysplasia; HGD: High-grade dysplasia.