those pesky 'paraneoplastic' syndromes! They are RARE, REALLY Rare!
I've got CIDP = 1-50,000 to get, then combine the Cancer w/the CIDP that number changes to like 1-1,500,000 ?
So, that I wasn't tested, I've no regrets about, the docs were dealing with the IMMEDIATE ISSUE! Ironically, the cancer I got? It seems that the CIDP treatments I get, IVIG, tend to encapsulate some cancers and that's what had happened to me... I believe, tho there was only one small trial done and it was soo close to my own history it was twilight zone time? No proof tho, so, no facts to connect those dots.

Back to the issue of phlegm? I agree with Bryanna about saline sprays! They are simple solutions and not DRUGS for those who hate that concept. I also am prescribed Nasonex [what I call Nose-Teflon] which coats the nose and keeps some irritants from getting in those passages. It can help some? But before committing? Ask for samples, get the script and then READ the prescribing info to see if this med and others are compatable.... some are not.

I wake up each AM and glorb/glarb up gunk for a while-then settle down. It goes with sinusitis, allergies and a house [that while declared free]- is a allergy incubator. As long as the stuff is clear? I'm OK!

Hey! We all go on, we get by AND we survive! Let all of us beat the odds!
Hugs and hope to all! - j