Hi, cocofrance
First of all, welcome to the OCF - glad you are here, sorry you have to be. It is wonderful you were able to be with your brother to help him. It must be hard to be so far away now.

If you go to this page on the OCF website - http://www.oralcancerfoundation.org/treatment/guidelines.php

and scroll down a bit, you will find a .pdf on Treatment Guildlines. If you click on it and look at the follow-up recommendations, you will see that, typically, a physical exam would be performed every 1-3 months during the first year.

In the US, it is common for a follow-up MRI or PET/CT scan to be performed about 3 months after the completion of treatment. It is possible for both of these to show false positive, but if they are clear it is a very good sign.

Best wishes to you both.
Maria

CG to husband - SCC Tonsil T1N2M0 HPV+ Never Smoker
First symptoms 7/2010, DX 12/2010
TX 40 IRMT (1.8 gy) + 10 Cetuximab
PET Scans 6/2011 + 3/2012 clear, 5 year physical exam clear; chest CT's clear of cancer. On thyroid pills. Life is good.