Dear Jeanne,
Blood goes through kidneys, too. You should be sure that your husband sees a doctor that has experience in treating kidney cancer patients; kidney cancer is relatively rare and many doctors do not have this experience. You might want to join the KIDNEY-ONC email list (see
http://cancerguide.org/kofaq/ ); it is likely that you will find a person who has been in your husband's situation. You can find an doctor with experience in treating kidney cancer patients from the KIDNEY-ONC list or from the Kidney Cancer Association (800-850-9132).
You also might like to get a copy of your husband's path report so you know exactly what type of kidney cancer you are dealing with.