I'm searching for the root cause of these crusts and post nasal drip for 2 years now. So far, Thornwaldt crust type was the closest match so I'm awaiting an MRI now because CT is 'unremarkable'. Yesterday evening during another one of my desperate online searches I came across chronic nasopharyngitis again, for which EAT treatment in Japan seemed to be the only fix when I found out about chronic nasopharyngitis last year. However, I now found a research article where they used monopolar suction diathermy to fix it. The article describes my crusting and drip symptoms, it's a 100% match, including staph aureus, clear ct's, failing antibiotics, everything. I highlighted some things to show my ENT and if MRI turns out to be clear and it's not Thornwaldt, I'm going for monopolar suction diathermy. If my current ENT doesn't want to do it, I'll find another who wants to. Here's the article and the photo of the crust, which fully matches the appearance of my crust.