Assessment of five microarray experiments on gene expression profiling of breast cancer

In recent studies gene expression profiling of non-hereditary breast cancer has been increasingly popular. One way of sample differentiation of predominant clinical relevance usually assessed in those articles in the presence or absence of the Estrogen receptor in the tumor samples. At present, though, there is no consensus whether cDNAor Oligomicroarrays handle expression profiling better. We have started to assess the comparability of five published data sets generated by different array technologies.