Since your son is only 12 and has had type�1 diabetes for only four years with no rise in blood pressure and is in really very good control, I think that the urine protein is most unlikely to be a consequence of his diabetes.
That said, I think that the next step is to repeat the test. Presumably, a simple office dipstick method was used which can be a source of error, and, if the simple test is again positive, it would be a good idea to quantitate the amount of microalbumin present. If again confirmed, it might indicate a urinary tract infection which would be somewhat unusual in a boy, but again, if present, it would be worth not only treating but doing some simple X-rays to see if there is any evidence of a urinary tract malformation.
Its always possible too that your son has developed a subclinical glomerulonephritis that has nothing to do with his diabetes. If this persists and increases, it might be appropriate to consider a biopsy.
DOB
[Editor’s comment: A few additional thoughts:
Children this age should have an annual 24-hour urine collection for microalbumin done routinely anyway.
It is quite common for boys this age to have what is called “exercise-induced proteinuria.” Therefore, it is important that your son refrain from heavy physical activity for 24-hours prior to and, of course, during any urine collection.
If you are very concerned, you might your son’s doctor for a referral to a pediatric nephrologist.
SS]
