This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Polycystic Kidneys, Subject name: Medicine
Distal and collecting duct cysts are seen in? 
Select and explain. 
A. ADPKD, B. ARPKD, C. Tuberous sclerosis, D. Nephronophthisis
B: ARPKD
Answer: B: ARPKD 
Explanation: ADPKD: cysts are in coex & medulla (Hepatic cyst manifestation) ARPKD: Distal & Collecting duct cyst (Hepatic fibrosis) MC age- <1yr Protein affected- Fibrocystin(Chr. 6) Presentation- B\L Abdominal mass Hypolasia of lungs Peripoal fibrosis