Not so fun fact, yinrih cancer is contagious. That means a glob of your cells can just sluff off of you and latch onto some other poor dude to ruin his day.

Good news is yinrih can smell cancer long before it becomes a problem, so they can deal with it quickly.

Maybe not cannon, but a sect of lifebringers experiments on these transmissible tumors and develops a giant teratoma of teeth and limbs and entire heads or something.