Detection and location of Helicobacter pylori in human gastric carcinomas

Table 1 Numbers of H pylori positive cases in different histological sites.

Tumor site	No tumor site		Total
	+	-
+	30	3	33
-	25	51	76
Total	55	54	109

Table 2 Detection of H pylori by WS stain and PCR.

PCR	WS stain		Total
	+	-
+	38	4	42
-	20	47	67
Total	58	51	109

Table 3 Relationships between H pylori infection and gastric carcinomas in age, sex, site and lymph node metastasis.

Factors	Total cases	H pylori positive		χ2	P
		PCR	WS
Age (yr)
≥60	29	7	11	1.999P	0.157P
<60	80	35	47	3.705W	0.054W
Sex
Male	64	23	33	1.131P	0.288P
Female	45	19	25	2.500W	0.114W
Locus
Gastric antrum	55	22	29	1.221P	0.269P
Gastric fundus and gastric corpus	54	20	29	0.079W	0.778W
Lymph node metastasis
LN+	66	26	36	0.052P	0.819P
LN-	43	16	22	0.120W	0.440W

P: PCR results, W: WS results.

Table 4 H pylori infection comparison with histological types of gastric carcinoma.

Histological types	Total cases	PCR		WS
		P	N	P	N
Well-differentiated adenocarcinoma	23	9	14	12	11
Poorly-differentiated adenocarcinoma	49	16	33	24	25
Signet-ring cell carcinoma	17	7	10	11	6
Mucous adenocarcinoma	20	10	10	11	9

Table 5 Relationships between H pylori infection and clinical stages of gastric carcinomas.

Clinical stage	Total cases	Positive		Negative		χ2	P
		PCR	WS	PCR	WS
Early	16	10	12	6	4	4.548P	0.033P
Advanced	93	32	46	61	47	5.922W	0.015W

P: PCR results, W: WS results.