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.