Conclusion The German urological landscape has changed since the outbreak of COVID-19 with a significant shift of high priority surgeries but also continuation of elective surgical treatments. While screening and staff protection is employed heterogeneously, the number of infected German urologists stays low.

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Extracorporeal shock wave lithotripsy (SWL) is the current treatment modality of choice for upper urinary tract calculi. For stones with a diameter >2 cm and in lower calyceal stones and diverticular stones, the stone-free rate of SWL is rather poor. In these cases, conventional percutaneous nephrolithotomy (PCNL) leads to an increased stone-free rate, but morbidity with conventional PCNL is significant higher than in SWL. With the invention of miniaturized nephroscopes (mini-perc), new treatment options are available. The experience based on hundreds of treatments using mini-perc show comparable results of mini-perc to conventional PCNL and a complication rate comparable to that for SWL. These favorable results are independent of stone size, stone location, and patient age. In summary, mini-perc can be recommended as a primary approach to stones of the upper urinary tract exceeding 1 cm, larger lower-pole stones, and calyceal diverticular stones. Mini-perc can be regarded as an alternative treatment modality to conventional PCNL.

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