[A solitary cerebellar metastasis: a diagnostic exercise].

Presentation of a solitary cerebellar mass lead us to think about the presence of a primary tumour or the possibility of a pulmonary, mammary or digestive metastasis. However, once discarded these origins, is necessary to search the primary neoplasms in less frequent organs. Approximately, 5% of all intracranial metastasis have it's origin in a renal cancer. These lesions generally appear at the supratentorial area and within a generalized disease. In the other hand, the presentation of a solitary cerebellar metastasis from a renal carcinoma without affectation of other organs is a very unusual fact. We present a case of these characteristics discussing about diagnostic, therapeutic and prognostic aspects of this unpredictable tumor.