XI. Conference of child nephrology was held in Bratislava on 8th-9th June 2018. Peter Celec lectured on “Extracellular DNA – more than a specific biomarker”, Alexandra Kovalčíková presented “The effect of periodontitis on salivary markers of renal function”, and Marianna Gyurászová presented on the topic of “Oxidative stress in the experimental model of acute and chronic renal failure”.