Relationship between gastric mucosal atrophy by endoscopy and non-ampullary duodenal epithelial tumors

Table 3 Relationship between the non-ampullary duodenal epithelial tumors position and mucin phenotype, n (%)

NADET position		Part 1			Part 2			Part 3
Variable	Category	Gastric atrophy		P value	Gastric atrophy		P value	Gastric atrophy		P value
		Type C, n = 17	Type O, n = 7		Type C, n = 44	Type O, n = 18		Type C, n = 44	Type O, n = 4
Mucin phenotype	Gastric type	11 (64.7)	0 (0.0)	0.006	4 (9.1)	0 (0.0)	0.158	1 (2.3)	0 (0.0)	1
	GI type	4 (23.5)	3 (42.9)		15 (34.1)	3 (16.7)		11 (25.0)	1 (25.0)
	Intestinal type	2 (11.8)	4 (57.1)		25 (56.8)	15 (83.3)		32 (72.7)	3 (75.0)

Part 1 comprises the bulb. Part 2 comprises the region from the superior duodenal angle to the papilla. Part 3 comprises the region from the anal side of the papilla to the horizontal part. Type C comprises no or mild endoscopic gastric mucosal atrophy. Type O comprises severe endoscopic gastric mucosal atrophy. Type C and gastric-type non-ampullary duodenal epithelial tumors (G-NADETs) were independently associated with non-ampullary duodenal epithelial tumors in part 1. All 16 G-NADETs were type C. G-NADET: Gastric-type non-ampullary duodenal epithelial tumor; GI: Gastrointestinal; NADET: Non-ampullary duodenal epithelial tumor.