CRP and ureterolithiasis: Similarly, hematological markers of inflammation, such as C-reactive protein (CRP) levels and neutrophil-to-lymphocyte ratio (NLR), have been proposed as indicators of ureteral obstruction and inflammatory response, which may influence stone expulsion dynamics [8]. CRP and NLR are used as markers for predicting MET success due to their roles in reflecting the inflammatory status and systemic response to ureteral stones.