My son is in the hospital at this moment he has enlarged termor looking things sticking out of his neck and in his nose. He has frequent nose bleeds. They have removed them once before from just his nose but now they are back and worse than before he just had them removed 4 months ago I took it upon myself to read the chart and they said it was Rosai Dorfman I want to now where does it come from and how do we ger rid of it