This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
A Child presents with complaints of abdominal colic and hematuria USG showed a renal stone 2.5cm in diameter in renal pelvis the next step in management of this case ? 
Select and explain. 
A. ESWL, B. PCNL, C. Nephroureterostomy, D. Conservative
B: PCNL
Answer: B: PCNL 
Explanation: Ans is 'b' i.e. PCNL Also know Steinstrasse - literally means 'stone street' - it is condition which follows the use of ESWL. - small pieces of fragmented calculi collect and obstruct in the distal ureter, like sand occluding a straw.