Hello Rocketbee and welcome. I truly am sorry to hear about your cancer diagnosis'. As for your question, all I can do is offer an opinion.
From most articles I have read or heard about, I would have to side with your URO that there is no known connection between the 2 diseases (assuming the cancers are not metastatic).
I think this is a tough one for others to answer in which may be the case of why others have not responded.
I wish I could help you out more, but hopefully someone else that has dealt with the same situation will come through for you.
Rocketbee, just know we are glad to have you here, and if you have any other questions, please, feel free to ask away. We will do our best to answer you the best that we can. This truly is a great source to relate to.
Best wishes that all will turn out well for you.
Alice