A tissue sample to be analyzed is tested. Multiple different samples of multiple areas of said tissue sample, each of said multiple areas is a smaller area than an entire tissue sample to be analyzed. After analysis, the tissue sample is processed in a way that facilitates viewing tumor information on the sample, for example, by fixing or staining. An area is identified on the stained sample, and at least one of the samples that corresponds to an identified area is tested. This small area is tested using a technique that homogenizes the sample before testing.