Medullary cystic disease of the kidney is best diagnosed by:: (A) Ultrasound, (B) Nuclear scan, (C) Urography, (D) Biopsy
Answer is D. Answer is D (Biopsy): Although ultrasonography and CT scan can be useful in making a diagnosis of medullary cystic disease, an open renal biopsy that ensures recovery of tissue from the coicomedullary junction is definitive.