This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genitourinary radiology, Subject name: Radiology
"Swiss cheese" nephrogram on IVP is a feature of : 
Select and explain. 
A. Acute ureteral obstruction, B. Severe hydronephrosis, C. Polycystic Kidney Disease, D. Medullary cystic disease of kidney
C: Polycystic Kidney Disease
Answer: C: Polycystic Kidney Disease 
Explanation: In ADPKD, 'Swiss cheese'nephrogram is due to the presence of innumerable lucent cysts of various sizes throughout the kidneys.