Survival and acquired genetic alterations in colorectal cancer

P Laurent-Puig ¹, S Olschwang , O Delattre

⁰Laboratory of Tumor Genetics, Institut Curie, Paris, France.

Gastroenterology +

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April 1, 1992

View abstract on PubMed

Summary

Genetic alterations in colorectal cancer cells can predict patient survival. Loss of chromosome 17p alleles is a significant indicator of tumor aggressiveness, aiding in patient classification for chemotherapy.

Area Of Science

Oncology
Cancer Genetics

Background

Accurate prognosis for colorectal cancer is crucial for evaluating new therapies.
Somatic genetic alterations in tumor cells may serve as novel prognostic factors.

Purpose Of The Study

To investigate the prognostic value of genetic alterations alongside traditional factors in colorectal cancer.
To identify independent predictors of patient survival.

Main Methods

Examined 109 colorectal carcinomas for standard prognostic factors and genetic alterations (Ki-ras mutations, DNA content, allelic losses on chromosomes 17p, 18q, 5q, 1p).
Performed univariate and multivariate analyses to correlate these factors with 5-year survival.

Main Results

Histological staging, CEA levels, DNA content, and allelic loss on chromosomes 17p and 1p were significant in univariate analysis.
Multivariate analysis revealed histological staging and 17p allelic loss as independent predictors of shorter survival.

Conclusions

Loss of 17p alleles in colorectal carcinoma is a marker of tumor aggressiveness.
Monitoring 17p allelic loss may improve patient classification for adjuvant chemotherapy decisions.

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