This is the cut surface of a kidney that has been sectioned longitudinally. Six poorly demarcated, dark-red, wedge-shaped foci extend from the corticomedullary margin to the pelvis and are 4 to 7 mm wide at the corticomedullary junction. One, which corresponds to a cranial cortical depression, is itself slightly depressed on cut surface (infarct).The cortex of the left kidney has five, focal to focally extensive discolored foci that are restricted to the superficial one-half of the cortex. The smallest of these are rectangular, dark red foci in which each edge of the rectangular focus is approximately 5 mm. The largest of the superficial cortical foci consists of a 6 cm long band in the outer one-half of the cortex. All of the larger foci have a pink core with a ground glass surface (necrosis) surrounded by a 1-mm-thick yellow margin that is in turn surrounded by a 1-mm-thick, red outer margin of tissue. Close inspection reveals congested glomeruli in the less affected cortex, but these are not visible in the necrotic regions.
A macroscopic image of the canine kidney previously described. Less affected regions are uncharacteristically yellow. There are scattered aminar, supericial-cortical lesions. The smallest are dark red. The largest have a pink core with a ground glass surface (necrosis) surrounded by a 1-mm-thick yellow margin that is in turn surrounded by a 1-mm-thick, red outer margin of tissue. If you look closely you can see pin-point red structures scattered throughout the cortex that correspond to glomeruli.
The image depicts the right kidney from this case that has been sectioned longitudinally through the hilum. The section on the left shows the cut surfaces. The one on the right shows the capsular surface with the capsule removed. The capsular surface is speckled red and yellow with hundreds of widely scattered, pinpoint, red foci that are only visible with very close inspection (suspect congested or hemorrhagic glomeruli). The larger red foci account for half of the surface of the right kidney and they extend into the outer one-half of the cortex on cut surfaces. The kidney is otherwise pale.
This is a macroscopic photo of the right kidney. On cut surface the red foci are mostly limited to the superficial one-half of the cortex. Pinpoint red dots are clearly visible here, and they likely correspond to discolored glomeruli. The remainder of the cortex is yellow and it should be reddish brown.
These are some crazy kidneys! You don't have to be a pathologist to think these lesions are beautiful!
I have suspicions as to pathogenesis, but histo will tell.
9-yo dog. Clinicians susp granulomatous osteomyelitis of lumbar v but no gross lesions were evident.
#pathsky #vetpath #RenalPath
