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

Table 4 Comparison of Sessile serrated adenoma/polyp diagnosed in ulcerative colitis patients between pre-SCENIC (2012-2014) and post-SCENIC (2016-2018) periods

		Pre-SCENIC		Post-SCENIC
		No.	%	No.	%
No. of biopsies/patients		9/9		22/17
Frequency		9/1203	0.7	22/1273	1.7
Diagnosis	SSA/P	31	33.3	211	95.5
	SSA	5	55.6	1	4.5
	SSP	1	11.1	0
Single		9	100	17	77.3
Multiple		0		5	22.7
	Right	4	44.4	9	41
	Transverse	1	11.1	5	22.7
Location	Left	3	33.3	4	18.2
	Rectum	1	11.1	2	9.1
	Multiple sites	0		2	9.1
Synchronous adenoma		42	44.4	43	21.1
No. of patients with follow-up
	Biopsy	5		6
	Resection	24		0
Metachronous adenoma		45	44.4	36	15.8

¹One case with low-grade cytologic dysplasia.

²Tubular adenoma (TA) = 2, TA with focal high-grade dysplasia = 1, indefinite for dysplasia = 1.

³TA = 4.

⁴One case had history of pseudopolyps, dysplasia, and sigmoid stricture. The other case had synchronous multiple TAs/low-grade dysplasia (LGD).

⁵TA/LGD = 3, dysplasia (grade not provided) = 1.

⁶TA = 2, TA and sessile serrated adenoma/polyp = 1.

SCENIC: Surveillance for Colorectal Endoscopic Neoplasia Detection and Management in Inflammatory Bowel Disease Patients; SSA: Sessile serrated adenoma; SSP: Sessile serrated polyp; SSA/P: Sessile serrated adenoma/polyp.