Anonymous wrote:I don't have direct experience with this but know a certain amount about kidney issues due to a brother awaiting a transplant and a husband who went through comprehensive testing to donate. Roughly one in 1000 babies are born with one kidney, and that is usually discovered only incidentally later on. Two kidneys are not necessary, are an evolutionary biological redundancy. When there is one, it grows a bit to compensate and normally supports full renal functioning. I wouldn't jump to an association with defects without comprehensive further testing.
^^the only recommendation is to avoid contact sports that could inflict damage on the one kidney.