I would be concerned if I found a growth within the scrotum area. It would normally be a small pea sized mass and most often hard. But this varies from case to case.
It sounds as though from the exam they gave more then likely they would have caught this. (testicular cancer). Do not get over worried at this point yet.
The other kidney more then likely has a simple fatty tissue deposit and this is rare to be nothing more then that.
If you have not been tested via blood work for any STD I would suggest to do this to be on the safe side.
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