Leo, born 10/2008, screamed a lot from the beginning. At first we thought he had the so-called 3- month abdominal colics. But it did not stop, on the contrary it got worse from week to week. The pediatrician could not find anything, so we were told that he was a "screaming child". When he was 10 months old, he suddenly got a high fever and I noticed blood in his urine. The pediatrician diagnosed a urinary tract infection and prescribed antibiotics directly. However, since the urine values were so bad, he sent us to our local hospital, where pediatric urology was supposedly performed. There they found kidney stones during the ultrasound examination, but they said that this could not be (because he was still so small) and that it would be artifacts. However, we were given a next appointment in 6 weeks, where a further examination with contrast medium should be made. In the meantime, Leo got ill with a severe gastrointestinal infection and the pediatrician on duty sent us directly to the University hospital in Aachen. There, kidney stones (4 of them) were diagnosed and that he probably had several renal colics in the last 10 months. He was then operated there a total of 4 times and the stones were removed as far as possible. After the operations he felt much better and until today he has had no more colic. However, since the reason for the stone formation wasn’t clear, we were sent to Prof. Hoppe, who was still working at the University hospital in Cologne at the time. There we finally found out that he has PH III. Since then we visit him. There is still 1 small stone in the left kidney and in the course of time another small one has formed. Since these stones do not make problems, they are controlled only in 1/2 year rhythm. Leo is still well.