Casey,
You quoted a comment that included:
reasonable likelihood of lethal progression if left untreated
I have a problem with that injection of "lethal". Their words, not yours, of course, but that stinks to me. I have a very high risk of a hereditary cancer (all of my cousins on the same bloodline at a "certain age" have various stages of it).
The problem is not that it kills you, as it mostly occurs in the late 60s to mid 70s, and you have to live long enough to die from it (another 10+ years). The problem is that it leaves you blind early on in one or both eyes. I think that is a devastating enough effect of the disease to continue to call it cancer.
Something does not have to be "lethal" to effectively destroy your life.
Just my personal (non-mod) opinion.