Focusing specifically on MCT, a recent paper on the genome-wide gene expression characterization of 15 MCT samples by RNA-seq identified two distinct tumor subtypes (i.e., high-risk and low-risk), differing for 71 differentially expressed transcripts, that were associated with histological grade, survival time, Ki67 index, and occurrence of MCT-related death [54]. The gene discussed is MKI67; the disease is neoplasm.