What day is your weekly visit with the RO? Are your husbands symptoms (in his estimation) causing him enough discomfort that you need to inform the RO at your next daily treatment? Have you looked down his throat with a flashlight; can you see anything?
If you can see anything then maybe a daily look with the flashlight to see if it's growing is in order.

When I've needed to keep track of something to see if it's growing a daily picture with a digital camera, shot from the same distance can do a good job of showing changes.

Tony

Tony, 69, non-smoker, aerobatics pilot, bridge player/teacher, avid dancer (ballroom, latin, swing, country)

09/13 SCC, HPV 16, tonsillectomy, T2N0.
11/13 start rads, no chemo
12/13 taste gone, dry mouth,
02/14 hair slowly returning
05/14 taste the same, dry sinuses, irrigation helps.
01/15 food taste about 60% returned, dry sinuses are worse in winter.
12/20 no more sinus problems, taste pretty good