hydronephrosis

https://doi.org/10.1351/goldbook.10817
Swelling of the funnel-shaped part of the kidney, where urine is collected to enter the ureter.
Note: Hydronephrosis may be a congenital deformity or the consequence of an obstruction in the ureter.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 765 [Terms] [Paper]