[akomtu]

The adaptability of cancer makes me think it's in fact a parasitic distributed lifeform, similar to fungus, that turns cells into zombies.

[Vecr]

Cancer is your cells though, that's the problem.

[jbotz]

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.

[0] https://en.wikipedia.org/wiki/Devil_facial_tumour_disease

[treprinum]

Isn't it more like dead cells that are being reawakened, switching to fermentation to create as much NAD+ as possible to grow as fast as possible?