The present invention relates to the discovery of certain microRNAs that correlate with certain information regarding cancer. The microRNAs of the invention are selected from the group consisting of hsa-miR-15b, hsa-miR-181b, hsa-miR-191, hsa-miR-200c, and hsa-let-7g. If the expression of these microRNAs is increase, then the increased expression of these microRNAs is diagnostic for cancer, characterizes the cancer, prognosticates an expected response to cancer treatments, and/or prognosticates an expected survival of a patient. Embodiments of this discovery include a method, composition, kit and isolated nucleic acid.