There is no evidence that oral cancer has any familial genetic links. You would have to have the same risk factor influences that he did. So you would have the same degree of risk as any other person not related to your brother, and I would think the doctor's diligence may be as much influenced to comfort you (after what he knows the family has been through) with definitive information than real belief that there is real danger present.

Brian, stage 4 oral cancer survivor. OCF Founder and Director. The first responsibility of a leader is to define reality. The last is to say thank you. In between, the leader is a servant.