Abstract: This invention provides minimally invasive methods, reagents, diagnostic and prognostic markers useful for staging, prognosis and surveillance of colorectal cancers, and therapeutic intervention in individuals with colorectal cancers, or individuals who may be susceptible to developing colorectal cancers.

Abstract: This invention provides methods, reagents, and diagnostic and prognostic markers useful for minimally invasive identification, diagnosis, and therapeutic intervention in individuals with colorectal cancers, or individuals who may be susceptible to developing colorectal cancers.

Abstract: This invention provides minimally invasive methods, reagents, diagnostic and prognostic markers useful for staging, prognosis and surveillance of colorectal cancers, and therapeutic intervention in individuals with colorectal cancers, or individuals who may be susceptible to developing colorectal cancers.

Abstract: This invention provides methods, reagents, and diagnostic and prognostic markers useful for minimally invasive identification, diagnosis, and therapeutic intervention in individuals with colorectal cancers, or individuals who may be susceptible to developing colorectal cancers.

Abstract: A method is described for the detection of a rare deletion mutant allele in a population of wild-type individuals. DNA samples from the individuals are subjected to a modified form of polymerase chain reaction (PCR) which favors the replication of truncated DNA strands over the synthesis of wild-type full length strands. The preferred way to bias the process toward the synthesis of truncated DNA strands is by limiting the extension step in the PCR reaction protocol. This process permits the convenient detection of a deletion mutant allele from a population of 1000 wild type individuals with the full length allele.