A 9 year-old boy is brought to his physician by his mother for evaluation of bloody urine. His urine analysis shows Hg and RBC casts. His maternal grandfather suffered deafness and died of renal failure. Physical examination is normal except for cataract on his right eye. What is the most likely diagnosis of this boy’s condition? A- Polycystic kidney disease B- Wilm’s tumor C- Alport syndrome D- Fragil X syndrome http://medical-usmle.com/?p=921
