Inverted papilloma or inverted urothelial carcinoma. A problem not yet resolved in its totality. Contribution of two new cases to the literature

: We present two case of inverted vesical papillomas, one of a trabecular histology and the other glandular, which--in view of the appearance in the last few years of inverted papillomas coexisting alongside other urothelium tumorous states, recurring and even malignant inverted papillomas--raise the possibility of them being considered as superficial urothelium carcinomas. We propose the use of post-surgical endo-vesical chemotherapy, above all in the patients affected by the trabecular variety of inverted papillomas, due to their high indices of recurrence and high possibilities of malignancy.