Table 1

Frequency of gastrin positive colorectal carcinomas

	Per cent positive
No of specimens	Progastrin	Gastrin-amide	Gastrin-gly	Assay method	Reference
16	NM	0	NM	RIA	4
12	100	8	ND	RIA	6
44	100	43	45	RIA	7
15	100	100	100	RIA	8
32	100	69	44	RIA	15
23	87	97	NM	IHC	19

RIA, radioimmunoassay; IHC, immunohistochemistry; ND, not detected; NM, not measured.