[Gastric cancer: genetic and molecular abnormalities].

In this work, the genetic and molecular alterations involved in gastric carcinogenesis are shown; the affected genes are those that encoded for matrix metalloproteinases, cell growth factors and receptors, oncogenes, tumor suppressors, DNA repair and cell adhesion molecule genes, cell cycle regulators and others related to metastasis, as well as lost of heterozygosity in chromosomal regions.