CASE HISTORY
A 15-year-old Warmblood gelding was presented with a history of macroscopic hematuria, stranguria and polyuria for two months. The hematuria was not exercise related and appeared at the end of urination.
The same symptoms occurred two years prior. Initially the practitioner performed transrectal palpation and ultrasonography which demonstrated a dilated right ureter and hydronephrosis of the kidney. The horse was referred to a clinic and cystoscopy revealed a mass in the area of the right ureteral orifice. After treatment with trimethoprim sulfonamide (25mg/kg//5mg/kg twice daily orally) for four weeks, symptoms fully regressed and the mass could no longer be seen in cystoscopy.
When the symptoms reoccurred two years later, a cystoscopy revealed again a mass protruding through the ureteral orifice. Antibiotic treatment for 2 weeks was initiated, however, no improvement of the clinical symptoms occurred and the horse was referred to Pferdeklinik Leichlingen.