[Inverted papillomas--cases at our service and review of the literature].
Inverted papillomas are rare tumours representing about 2.2% of all urothelial tumours (benign or malignant). Inverted papillomas are predominantly seen in the bladder but these tumours have also been described in other locations, all over the urinary tract. The authors report six additional cases of such tumours describing the individual characteristics of each case, presenting symptoms, treatment employed and follow up available. A review of the literature relative to aetiology, clinical signs and symptoms, diagnostic criteria, treatment options and outcome has also been carried out.