I have not heard that term either, but I want to wish you well with your upcoming doctor's appointment. I was diagnosed 22 years ago, and my recent scan showed enlarged mediastinal lymph nodes also. They rescanned me 3 months later (2 weeks ago) and the mediastinal nodes were shrinking, so they believe it is inflammation and I am being closely monitored. Please feel free to follow up with us, we are here to share and support each other. Warmly, Alisa, LungCancer.net Team