I have sent you a private message (PM). It has a list of common abbreviations we use frequently around here.

One of the most important things that needs to be a major focus is nutrition and hydration. If your father isnt a good eater now, he needs to turn that around and become a great eater immediately. His daily intake must be at least 2500 calories and 48 oz of water daily. That is a minimum! Anything less and he will soon begin to struggle and end up with dehydration and malnutrition. Im not trying to scare you but this will happen. It happened to me and I was hospitalized a few times for it and that was not easy on me or my children. Right now he should be bulking up and eating all his favorites. His sense of taste will change temporarily and he will soon miss all his favorites, so he needs to eat them now. For many swallowing becomes difficult, even if he gets a feeding tube and struggles with swallowing he still must do it to preserve his swallowing function.

Since your father has BOT OC, he may be HPV+. If this hasnt been checked, ask about it.

If he hasnt yet been to the dentist he needs to go ASAP and get any questionable teeth pulled before starting treatments. Flouride trays need to be made and started to be used.

A full blood count including thyroid should be done now.

A hearing test should be done. Most of us have gotten cisplatin which is known to cause hearing loss for some. I was not affected but I know several who were. If he noticed anything different he needs to speak up immediately as this is permanent.

Thats just some of what he should be doing. Best wishes with everything!