1 Assessment of the utility of individual stool-based, serum-based and urine-based biomarkers for discriminating between patients with adenocarcinomas, patients with adenomas, patients without adenomas and normal subjects.
2 Assessment of the utility of individual stool-based, serum-based and urine-based biomarkers for detecting indicators of carcinogenesis known to be present or not present in adenomas, adenocarcinomas, and normal mucosa.
3 Construction of a panel of markers from those considered in Objectives 1 and 2 to discriminate, under a number of assumptions concerning prevalence and cost of misclassification, between:
a Subjects with normal colons versus patients without adenomas, patients with adenomas and patients with cancers;
b Subjects with normal colons, patients without adenomas and patients with adenomas, versus subjects with cancers;
c Subjects with normal colons versus patients without and patients with adenomas versus patients with cancers.
4 Comparison of the characteristics of individual markers and panels as discriminators to those of the established current standard, Fecal Occult Blood test (FOBT).
5 Development of a bank of stool samples linked to serum, tissue, urine and clinical data from patients with colorectal cancer, adenomas and normal controls for validation of stool-based markers that may be developed in the future. |