It's unlikely that cancer would not have progressed further after a year. Cancerous nodes are usually firm, fixated in place, and painless to the patient. They can be bilateral (I was) in advanced patients. But by that time there is usually a frank presentation of the disease intraorally. The could be something other than a lymph node, such as a cyst.

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.