A proximal renal stone measuring about 6 millimeters is best managed with which intervention?

A proximal renal stone measuring about 6 millimeters is best managed with which intervention?

• A. Medical expulsive therapy alone
• B. Ureteroscopy with stent
• C. ESWL
• D. Percutaneous nephrolithotomy

Answer: (C)

When a proximal renal stone is small enough, noninvasive stone fragmentation to allow passage is the preferred approach. Extracorporeal shock wave lithotripsy uses external energy to fragment the stone into tiny pieces that can pass spontaneously, minimizing invasiveness. A 6 mm kidney stone is well within the size range where ESWL is effective, making it a good first-line option. Medical expulsive therapy mainly helps with distal ureteral stones by relaxing the ureter to aid passage, and is not reliably curative for renal stones. Ureteroscopy with a stent is more invasive and typically reserved after ESWL failure or when ESWL isn’t feasible. Percutaneous nephrolithotomy is reserved for larger or more complex stones, usually over 2 cm.

When a proximal renal stone is small enough, noninvasive stone fragmentation to allow passage is the preferred approach. Extracorporeal shock wave lithotripsy uses external energy to fragment the stone into tiny pieces that can pass spontaneously, minimizing invasiveness. A 6 mm kidney stone is well within the size range where ESWL is effective, making it a good first-line option.

Medical expulsive therapy mainly helps with distal ureteral stones by relaxing the ureter to aid passage, and is not reliably curative for renal stones. Ureteroscopy with a stent is more invasive and typically reserved after ESWL failure or when ESWL isn’t feasible. Percutaneous nephrolithotomy is reserved for larger or more complex stones, usually over 2 cm.