[Maxillary ameloblastoma]. / Ameloblastoma maxilar.

Ameloblastoma is a tumor constituted by proliferative odontogenic epithelium that, in 20% of the cases, originates in the maxilla. Clinical and radiologically it can be multicystic, monocystic and peripheral. Although it is considered benign, the tumor may grow slowly, with intracranial invasion or distant spread. In the present work we analyze our experience and the literature on the field, and, as a conclusion, we recommend initial complete surgical excision.

[Multilocular cystic nephroma. Preoperative diagnosis with CAT]. / Nefroma quístico multilocular: Diagnóstico preoperatorio mediante TAC.

We report a case of multilocular cystic nephroma in a 45-year-old female patient who had been referred for urological evaluation on detecting a mass in the left lumbar region. Patient work up included CT evaluation, which proved to be the most useful in making the diagnosis. The literature is reviewed with special reference to the nature of this lesion and the existing controversy on whether it is an embryonary tumor or a congenital malformation.