Macroscopic appearance of chronic renal disease in captive cheetahs (Acinonyx jubatus).

A) pale misshapen kidney with a multifocally pitted and indented capsular surface due to foci of renal cortical fibrosis; B) cut section of kidney showing linear rays of renal medullary fibrosis and amyloidosis extending from the corticomedullary junction to the pelvis (arrowheads) which are variably associated with a narrowed overlying cortex due to chronic renal infarction(arrows).