Small world, indeed. My daughter graduated from Purdue, and worked in Hospital Admin for 4 years before going to nursing school.
As to how much work Marvin will miss, that's a real tough question. Altho most people experience the same side effects of radiation, the recovery period and the ability to work vary greatly. Depending on his job,he may be able to continue to work through the first few weeks of radiation, but after that, he is liable to feel lousy for a while [most people do] He will need time to rest and get proper nutrition. [I am glad to hear he will have a tube, just in case]. Keep us posted. Amy in the Ozarks