Cancer is a strange beast. Some types of tumors do not 'age' like usual, some are 'hyper aged', some die off at incredible rates, but reproduce at even higher rates.

Really, cancer cells are so wracked with errors and DNA damage, typically, that they really aren't the species that they grew up in anymore.

For one instance, some tumor metabolisms are radically different than what is 'normal', more different than even what is seen in even prokaryotes: https://en.wikipedia.org/wiki/Warburg_effect