How does metaplastic thymoma histology impact your decision regarding adjuvant radiation?

This is a good question. I honestly have never seen this histology, and I help write the UpToDate thymoma section and am a thymoma enthusiast (meaning I like to read about it/treat it, not to have it). Thymomas really run the spectrum of aggressiveness, and the approach to them in the adjuvant setting does change a bit depending on the histology. I read "metaplastic"... sounds not good. Then read, "It's a biphasic mass of spindle cells and epithelial cells" which also sounds worrisome, but then ...