“…Renal disorders requiring unilateral nephrectomy are unusual in horses, and pose considerable challenges to the surgeon. Indications are unilateral hydronephrosis, abscessation, neoplasia, ureteropelvic polyp, pyelonephritis, nephrolithiasis, uretrolithiasis, renal parasitic lesions (Halicephalobus deletrix), idiopathic renal haematuria and ectopic ureter (Lilich et al 2006;Ferguson et al 2007).…”