Renal cortical hypoplasia in a dog.

A case of renal cortical hypoplasia in a Cocker Spaniel bitch is presented. The dog, under clinical observation between the ages of 15 to 26 months, was found to have advancing chronic renal insufficiency. Necropsy examination revealed a markedly hypoplastic renal cortex with a reduced number of glomeruli, some dilated Bowman's capsules, small glomerular tufts, and early interstitial nephritis and fibrosis characteristic of renal cortical hypoplasia.