Furthermore, based on the interquartile range, the spread of FOXM1 expression varied in some cancer types more than others; e.g., breast cancer (BRCA) has a wide spread while testicular germ cell tumors (TCGT) have a narrow spread (Figure 1A), which could be due to some cancers consisting of more than one clearly defined subtype and therefore having more genetic diversity. This evidence concerns the gene FOXM1 and testicular germ cell tumor.