Ida... did they not operate on you at all? Usually with oral cancer of the tongue (you can see it and feel it on the oral tongue) your first line of defense is actually surgery... then radiation and chemo in tandem... did they operate to remove the tumor? Did you have clear margins on your biopsy? sorry I'm still unsure as to where the actual tumor - recurrence is. The Base of tongue is actually in your throat and invisible to the human eye. It still sounds to me like it's your oral tongue if so it should be surgically excised. Then followed up with radiation and chemo... goood luck - so sorry about the recurrence... hugs.. you will get through this. take care.