Now, cancer isn't something to laugh at, it's something that kills a lot of people, my grandmother included, she died of bone cancer, a complication after she had breast cancer.

That said, I've done some research into his condition and the thing is that it's very survivable and you can live a very long time with precancerous cells before they turn into gastric cancer if you only pay attention to what you do with your body.
So just like lung cancer, stop smoking, liver cancer, stop drinking, stomach cancer or in his case, focal intestinal metaplasia, it only evolves into actual stomach cancer if you don't pay attention to what you eat and have your diet consist of fresh things and no salty or fatty food. Something we know is very common in his diet... He also apparently has other stomach related issues that he doesn't seem to heed enough... There's a reason I put "eats or drinks something he isn't supposed to" unto that bingo card because god damn does he do it a lot.
He also has been vaping when he already had one collapsed lung years back. How absolutely moronic can you be??? The vaping also hasn't helped his condition, by the way, it's among one of the causes.

Now, you know, all that said and shit, it doesn't surprise me that he uses this to make himself even more of a victim. Cancer is a serious thing and people will take it serious too and will pity him because of it. So yeah, give him lots of useless shit etc. That will definitely heal his cancer. /s