Table 1.

Proportion of K-ras positivity in stool from positive FOBT cards with amplified DNA, by type of finding in the colon

Finding in colon	Number of cases with positive FOBT and DNA amplification	Number of cases with K-ras mutation	Proportion of K-ras positivity
Carcinoma+ Adenoma	48	16	33.0%
Adenocarcinoma	23	8	34.8%
Adenoma	25	8	32.0%
All other*	82	16	19.5%
No follow up	50	7	14.0%
Total positive FOBT	180	39	21.7%

^*Includes non-adenomatous polyps, diverticuli, IBD, hemorrhoids and upper GI findings