Abstract:
:The molecular genetic alterations in colorectal carcinoma are among the best understood of any common human cancer. Identified abnormalities include both dominant-acting oncogenes (ras, myc, src) and suppressor genes which undergo inactivation or deletion (deleted in colorectal carcinoma gene [DCC], p53, adenomatous polyposis coli gene [APC], and probably loci on chromosomes 1p and 22q). Accumulation of multiple abnormalities is evident in the adenoma-carcinoma sequence with a preferential order, and alteration of DNA methylation is an especially early event. Identification of molecular genetic markers useful for classification and staging of colorectal carcinoma is in its infancy. Deletion of the p53 gene on chromosome 17p, deletion of the DCC gene on 18q, and high fractional allelic loss (fraction of evaluable nonacrocentric autosomal arms with deletion) have been associated with distant metastases and with poorer prognosis in patients without initial evidence of disseminated disease. Additional studies are needed to determine the possible role of these alterations in clinical management.
journal_name
Cancerjournal_title
Cancerauthors
Hamilton SRdoi
10.1002/1097-0142(19920315)69:6+<1589::aid-cncr282subject
Has Abstractpub_date
1992-03-15 00:00:00pages
1589-91issue
6 Suppleissn
0008-543Xissn
1097-0142journal_volume
69pub_type
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