I had my kidney transplant in May 2015. In May 2016, I had a routine one year kidney biopsy that was aborted as they found my kidney transplant had hydronephrosis. I had no symptoms and my labs were great. I will always be thankful for that standard one year ultrasound as part of a biopsy as who knows if my kidney would have developed damage over time from the hydronephrosis. My hydronephrosis was caused by my having a “flabby bladder” that allowed urine to backup into the kidney. I’ve been on tamsulosin since then, which has taken care of the problem.
I wish your son well on his kidney transplant adventures in life. Sometimes there are challenges but our transplant teams want out success with our transplants.