[Clinico-anatomical picture of cystic renal dysplasia]

The variety of clinical conditions leading to diagnosis and surgery of cystic renal dysplasia is demonstrated by 5 case reports. Etiological and histological features of this rare developmental abnormality are outlined. Surgical removal of the cystically degenerated renal bud is only indicated if the size of the tumor or vesico-ureteral reflux and inflammation causes lumbar pain.