MSI1 and malignant colon neoplasm: Thus, Msi1 expression in lung cancer cells has similar characteristics and function as previously noted for breast cancer [24], medulloblastoma [35], glioblastoma [36, 37] and colon cancer [38, 39] cells, and is consistent with the original observation of Msi1 being a marker for neural stem and progenitor cells [10, 40].