Histologic characteristics of gastric polyps in Korea: Emphasis on discrepancy between endoscopic forceps biopsy and endoscopic mucosal resection specimen

Table 1 Patient characteristics, polyp characteristics, and biopsy results

Age (Mean ± SD, yr)	59.9 ± 10.8
Sex (Male : Female)	25:49
Number of polyps
1	66 (89.2%)
2	5 (6.8%)
3	3 (4.0%)
Location of polyps
Antrum	50 (58.8%)
Body
Low	16 (18.8%)
Mid	9 (10.6%)
High	5 (5.9%)
Angle	3 (3.5%)
Fundus	2 (2.4%)
Diameter of polyps (cm)
< 1	36 (42.4%)
1-1.9	38 (44.7%)
2-3	11 (12.9%)
Yamada type
I	33 (33.8%)
II	24 (28.2%)
III	12 (14.1%)
IV	16 (18.9%)
Endoscopic biopsy results
Tubular adenoma	41 (48.2%)
Hyperplastic polyp	26 (30.6%)
Inflammatory polyp	13 (15.3%)
Fundic gland polyp	2 (2.4%)
Dysplasia	2 (2.4%)
Tubulovillous adenoma	1 (1.1%)

Table 2 Pathological results of resected specimen

Pathology	n (%)
Tubular adenoma	39 (45.9)
Hyperplastic polyp	27 (31.8)
Inflammatory polyp	8 (9.4)
Hamartomatous polyp	3 (3.5)
Fundic gland polyp	2 (2.4)
Tubulovillous adenoma	2 (2.4)
Adenocarcinoma	2 (2.4)
Dysplasia	1 (1.1)
Mucosal pseudolipomatosis	1 (1.1)
Total	85 (100)

Table 3 Histological comparison between results of endoscopic biopsy and resected specimen

Endoscopic biopsy		Resected specimen
		Tubular adenoma	Hyperplastic polyp	Inflammatory polyp	Hamartoma	Fundic gland polyp	Tubulovillous adenoma	Adenocarcinoma	Dysplasia	MP1	Total
	Tubular adenoma	35 (85.4%)	0	2 (4.9%)	0	0	1 (2.4%)	2 (4.9%)	1 (2.4%)	0	41
	Hyperplastic polyp	1 (3.8%)	22 (84.8%)	1 (3.8%)	1 (3.8%)	0	0	0	0	1 (3.8%)	26
	Inflammatory polyp	2 (15.4%)	5 (38.5%)	4 (30.7%)	0	2 (15.4%)	0	0	0	0	13
	Fundic gland polyp	0	0	0	2 (100%)	0	0	0	0	0	2
	Dysplasia	1 (50%)	0	1 (50%)	0	0	0	0	0	0	2
	Tubulovillous adenoma	0	0	0	0	0	1 (100%)	0	0	0	1
Total		39	27	8	3	2	2	2	1	1	85

¹MP, Mucosal pseudolipomatosis