Abstract: The present invention provides a microarray useful as a tool in the diagnosis and/or prognosis of certain types of cancers, particularly urogenital cancers. The microarray can include a plurality of genomic regions represented thereon, the genomic regions corresponding to regions wherein alterations, such as copy number aberrations, at such locations correlate to specific, identifiable cancers, particularly prostate, renal, or bladder tumors. The invention further provides methods of diagnosing certain types of cancers, particularly urogenital cancers, more particularly renal cortical cancers. The methods can comprise analyzing genetic material from a human individual to determine the presence or presence of certain aberrations and using a decision tree to classify the subtype of renal cortical neoplasm present in the sample.