Hydronephrosis

Hydronephrosis. Courtesy of T. Scase University of Cambridge

• Obstruction of the urinary tract anywhere between the renal pelvis and urethra can lead to hydronephrosis.
• Continued back pressure along with the persistence of glomerular filtration leads to the development of ischaemic lesions and pressure atrophy of the tubules.
• Dilatation of the renal pelvis and calyces occurs.