Acute pyelonephritis
Acute pyelonephritis is an exudative purulent localized inflammation of kidney and renal pelvis. The renal parenchyma presents in the interstitium abscesses (suppurative necrosis), consisting in purulent exudate (pus): neutrophils, fibrin, cell debris and central germ colonies (hematoxylinophils). Tubules are damaged by exudate and may contain neutrophil casts. In the early stages, glomeruli and vessels are normal. (Hematoxylin-eosine, ob. x10)
Acute pyelonephritis (Hematoxylin-eosine, ob. x10)
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