Multiple biomarkers of colorectal tumor in a differential diagnosis model: a quantitative study.
OBJECTIVE
To evaluate the multiple biomarkers of colorectal tumor and their potential usage in early diagnosis of colorectal cancers.


METHODS
Multiple biomarkers (DNA contents, AgNOR, PCNA, p53, c-erbB-2) in 10 normal colorectal mucosae, 37 colorectal adenomas and 55 colorectal cancers were analyzed quantitatively in the computed processing imaging system. Discrimination patterns were employed to evaluate the significance of single and multiple indices in diagnosis of colorectal cancers.


RESULTS
The mean values of the analyzed parameters increased in order of the normal mucosa, adenoma and adenocarcinoma, and this tendency reflected the progression of colorectal malignancy. The parameters including DNA index, positive rates, densities of AgNOR, c-erbB-2, and p53, shape and density of nucleus were relatively valuable for diagnoses. Then a diagnostic discrimination model was established. The samples were confirmed with the model, the sensitivity rates in cancer group and adenoma group were 96.36% and 89.19%, respectively. The value of proliferating cell nuclear antigen (PCNA) in early diagnosis of colorectal cancers was uncertain.


CONCLUSIONS
The quantitative evaluation of some parameters for colorectal tumor can provide reproducible data for differential diagnosis. The established diagnostic discrimination model may be of clinicopathological value, and can make the early diagnosis of colorectal cancer possible.
Jin
Wen
W
Department of Pathology, Fujian Medical University, Fuzhou 350004, Fujian Province, China. jinwen9484@sina.com
Gao
Mei-Qin
MQ
Lin
Zhi-Wu
ZW
Yang
Dai-Xing
DX
D000236:Adenoma / Q000175:diagnosis* / Q000378:metabolism; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000378:metabolism*; D002277:Carcinoma / Q000175:diagnosis* / Q000378:metabolism; D015179:Colorectal Neoplasms / Q000175:diagnosis* / Q000378:metabolism; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged
D014408:Biomarkers, Tumor