Infection stone and 2 PCN

Rt upper pole, ultramini-PCNL (MIP-S) + Rt midpole mPCNL (MIP-M) surgery for large staghorn stone.

- If we want no increase of intrarenal pressure, two percutaneous tracts are necessary.

- The upper pole tract and the ultra-miniaturized nephroscope system are very helpful regarding vascular structure in the upper pole.