Im going to agree with klo, biopsies are great - clear margins are great too but you should have had a ct/pet/or MRI - post biopsy and pathology to determine any possible spread to your nodes. Also this being a third recurrence (though recurrence this close to a previous biopsy is not really a recurrence - it just means they didnt get it all). you should definately be given the option of radiation and chemo. And possibly a proper surgery with neck dissection and possible rebuild of the missing tongue. (I know it likely hurts alot) where are you being treated - you should be seen at a cancer center if your not.

Hugs and welcome.