Hello Martin, a ureterocele is a defect in the ureter that runs between your kidney and bladder. Where mine connects to the bladder the ureter is weakened and fills up like a water balloon before releasing the urine into my bladder. This is what causes my hydronephrosis. I have it monitored once a year with ultrasound to ensure my kidney is not weakening or becoming too enlarged. I would recommend seeing a nephrologist to check on your kidney and make sure it is functioning as it should. They may do lab work, urine and blood as well as an ultrasound. It would be good just for peace of mind as well, and the Doctor can advise you if there are any things you should be aware of. My Doctor also asked me to wear a medical alert bracelet that states solitary right kidney in the event of an accident so they can be proactive in preserving my kidney at all cost. I’m 43 and have not had any major issues. I avoid ibuprofen and limit the amount of citric acid I consume but that is based on my kidney and what my Doctor recommended. I have a strong family history of kidney cancer. My father his mother and her brother all had a kidney removed due to cancer. So for me the best approach is to be proactive and see my Doctor regularly. Hope this helps.