Quiste renal infectado por brucela

objetives: to report one case of renal cyst infected by brucella, an exceptional pathology in our environment. methods: 82-year-old patient who was referred from his primary care physician for persistent microhematuria and piuria without evidence of infection. results: radiological studies (xr+us+ctscan) showed a left renal cyst with parietal calcifications. pathologic study was compatible with complicated cyst, with cultured (+) to brucella spp. conclusions: renal involvement by brucella is exceptional, and the cystic renal involvement is by far one of the more exceptional manifestations.