 This study investigated the effects of ureteral stenting on the ureter. The results showed that stenting caused significant inflammation and fibrosis of the ureter. Epithelial mesenchymal transition was identified as a driver of fibrosis, which could lead to impaired ureteral function over time. Additionally, mild inflammation was detected in the contralateral, unstented ureter. This article was authored by Alina Rykertz, Felipe Eltit, Kimora Scotland and others.