Since bladder cancer in pets grows quite rapidly and is often advanced at the time of diagnosis, complete surgical removal of the mass is not often possible. (1800petmeds.com)
Glioblastoma is the most lethal form of primary brain tumor and leads to death in patients by invading the brain tissue in a process that allows single cells to move through normal brain tissue, which makes complete surgical removal of the tumor impossible. (sciencedaily.com)