Alz - ideally the correct treatment for oral tongue cancer is - removal of the tumor surgically - a neck dissection - then depending on tumor / size and or infiltration ( perineural involvement ) and differentiation - well, moderate, or poor - they decide on radiation, and chemo, or just radiation. They do it this way because first off - it is the best way of getting the cancer - cut it out with clear margin - then they use radiation to clean up any stray cells. Chemo is added to enhance radiation - it works systemically - however it kills stray cells for the most part. Unless there are a combination of chemos used - sometimes they'll do that first if it's a high stage cancer and a large tumor. It weakens the cancer / tumor, possibly shrinks it, then they remove it surgically.

Anyway - this is all would haves and should haves - what's done is done. They need to remove the tumor surgically, and likely do a neck dissection. The decide on possibly another round of radiation and possible chemo. (this is for a visible cancer on the tongue) if it is base of tongue - which it doesn't sound like it is - then radiation and chemo are usually the first choice. Regardless good luck.... And I'm sending prayers your way.