What kind of doctor treats and specializes in tongue cancer?

Several: Several physicians are involved in the care of patients with tongue cancer. An ear, nose, and throat physician (otolaryngologist); radiation oncologist; and medical oncologist may all be involved at some point during diagnosis and treatment.

Oral Surgeon, ENT: The first contacts should be with either an oral surgeon or ENT md. You might also have a need for an oncologist, as part of the treatment team. I would see the oral surgeon first.