Hey Ron,
Welcome to the site! My husband had a bit more than one third of his tongue removed and modified neck dissections on both sides. Unfortunately, we were not at a comprehensive cancer center (hadn't found this site yet) and the oral surgeon said since there were clear margins and no lymph node involvement that Dan did not need radiation. Exactly four months later Dan had a swollen gland which turned out to be a very aggressive neck tumor that was attached to his carotid and jugular. Needless to say we wish we would have been more informed at the time of surgery.
God bless and take care,
Debbie