BIRC5 and glioblastoma: A clear majority of malignancies, including blood, breast, colon, ovarian, lung, liver, uterus, glioblastoma, astrocytoma, meningioma, bladder, prostate, gastrointestinal, non-melanoma skin cancer, melanoma, soft tissue sarcoma and with viral induced neoplasms show overexpression of survivin at different stages in tumor development [51–54].