At the risk of you all thinking I am some sort of mad, lurking, stalking, troll-like nutball, I have another story to add to Gig's list of positive stories.
And in case you're wondering (I would be), yes, the friends I have told you about are all absolutely people I know in RL - if it seems odd, its just that I'm quite old, and have met lots of people, and therefore have collected a lot of stories to tell 
My best mate's ex boyfriend had lymphoma a few (9? 10?) years ago. Stage 4, and all over his abdomen: liver, guts, you name it. He responded well to chemo, which was pretty amazing stuff even back then, and has been in remission ever since. They don't consider it 'gone' as technically, Stage 4 doesn't go
but there is no sign of it, and he is fine. I know its not sarcoma, Gig, but there are some parallels - not least that he was in his late 30s when it happened, and therefore young and in that group of people who tend to respond best to chemo. Like you, and like Topsy, and definitely like RWU (who won't remember me, but whom I remember and whose 'voice' I am very happy to 'hear' again
. )
There are so many stories like this that people don't get to hear, and it seems so important that they get heard, iyswim.