It makes sense to me. I once read a lung cell has to evade seven different anti-cancer mechanisms to become a malignant stem. If there are ten different ways

It makes sense to me. I once read a lung cell has to evade seven different anti-cancer mechanisms to become a malignant stem. If there are ten different ways to get around each defense, that would mean ten million different possible configurations of lung cancer, with all the therapeutic headaches that implies. Edit: And that's just for one cell type out of the myriad that compose a functioning lung.