Can you tell me about the illness acidosis tubular renal? If my son would have this. Is it so dangerous in the present and in the future?

Several types. These range from mild birth defects detectable only using the lab to some serious problems that may result in skeletal growth problems and/or require medication. It's been suggested that dickens' "tiny tim" suffered one of the RTA variants. I'm glad you are taking a proactive approach and hope you will find the exact diagnosis and expected outcome -- your physician is bound by law to share this.