DR. CHRISTIAN KOLLMANNSBERGER MD FRCPC
Vancouver Cancer Centre
Without the full history and medical background of both patients, there is not enough information in the question for an definitive opinion. However, with a first-degree relative (parent, brother, sister or child), it might be worth further investigation to see if a genetic condition can be verified. Depending on the background of the case, in my clinic, I might refer the patients to consult a hereditary cancer specialist. But it’s important to remember, you must have a referral from your treating physician.
More on genes, genetics and kidney cancer on this link.