Kris has had none post surgery.
I asked that question last week. The docs said that his anatomy is so changed that a scan would be impossible to interpret .
I'm happy with that. They are too stressful. Last year his PET was clear, only to have a reoccurrence a few months later .so, why bother. I think symptoms are the way to go. Pain and /or bleeding - of which he has none.
Tammy

Caregiver/advocate to Husband Kris age 59@ diagnosis
DX Dec '10 SCC BOT T4aN2bM0 HPV+ve.Cisplatin x3 35 IMRT.
PET 6/11 clear.
R) level 2-4 neck dissection 8/1/11 to remove residual node - necrotic with NED
Feb '12 Ca back.. 3/8/12 total glossectomy/laryngectomy/bilat neck dissection/partial pharyngectomy etc. clear margins. All nodes negative for disease. PEG in.
March 2017 - 5 years disease free. Woohoo!