My infant son's ultrasound showed thinning of cortex in right kidney. is this dangerous?

Follow-up W/ Doctor: Your son's age, specific details not given. Thinning of cortex indicates decrease in structures important to kidney function; associated with lower urinary tract disorders in 50% of cases; is 1.5 times more common in males; can be associated w/ congenital anomalies of other organs in 30%. More info needed to formulate any conclusions about your son's prognosis. Follow-up w/ your doctor for answers