>>atomro+(OP)
The adaptability of cancer makes me think it's in fact a parasitic distributed lifeform, similar to fungus, that turns cells into zombies.
>>Vecr+Tv2
Usually, yes. But there do exist infectious cancers that spread between individuals. One is the face cancer that's been killing Tasmanian devils[0]... it started in one individual and spreads to others when they fight (biting each other). Apparently there's a similar (although rarer) cancers that's sexually transmitted between dogs.