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Breuer, W.; Nickeleit, V.; Metzner, M.; Knubben-Schweizer, G.; Hafner-Marx, A. (2017): Fatal proteinuric kidney disease in a 30-month-old German Fleckvieh heifer caused by unilateral focal segmental glomerulosclerosis subsequent to a non-functional counterpart kidney. In: Schweizer Archiv für Tierheilkunde, Vol. 159, No. 3: pp. 179-184
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Abstract

A case of secondary focal segmental glomerulosclerosis (FSGS) in a heifer is presented. A 30-month-old female German Fleckvieh heifer showed deterioration of the general condition, a poor nutritional status, proteinuria, hypoalbuminemia, and renal azotemia. Pathologically, it was diagnosed with unilateral hydronephrosis, and contralateral renal fibrosis with numerous cysts. Histologically, the fibrotic kidney showed FSGS, hyaline reabsorption droplets in proximal tubular epithelial cells, interstitial fibrosis, and tubulointerstitial inflammation. Apart from that, thrombotic microangiopathy (TMA) was seen in few renal arteries and meningeal arterioles. Pathogenesis of FSGS secondary to unilateral renal parenchymal loss (hydronephrosis) and TMA is discussed.