In our studies of inherited urologic malignant disorders, there may be individuals from renal cancer families who do not undergo clinical evaluation for the presence of an inherited urologic malignant disorder at the National Institutes of Health because of their health problems, geographical location, or personal preference. Even though these individuals do not undergo a clinical evaluation of their suspected inherited urologic malignant disorder at the National Institutes of Health, they may have rare diseases that are extremely important to study. Therefore, we intend to collect blood samples for genetic studies from these individuals to facilitate linkage analysis and disease gene identification. Samples will be collected either by the individual's physician and sent to NIH, or will be collected by NIH physicians at either the individual's off-site location or at the NIH.