ca19-9 antibody recognizes an epithelial surface carbohydrate antigen originally derived from a human colorectal carcinoma cell line : it did not stain normal colorectal mucosa or adenomatous polyps , but showed focal expression of variable strength in regenerative , dysplastic , and cancerous mucosa in ulcerative colitis , and in non-colitic colorectal carcinoma .
C0903677
epithelial surface
C0009402
colorectal carcinoma