Abstract
A unique case was reported of an undifferentiated carcinoma of the prostate which produced a solitary cerebellar metastatic lesion causing the patient''s admission to hospital. Signs and symptoms of genitourinary involvement were absent. The rarity of parenchymal cerebral or cerebellar lesions metastatisizing from a primary in the prostate gland was emphasized and contrasted. Prostatic cancer has a tendency to metastasize to the skull and vertebral, secondarily involving the brain and spinal cord through extradural extension. In contrast, the prostate must be considered as a more common primary site when diffuse meningeal carcinomatosis is discovered. An obscure posterior fossa mass in an adult may be metastatic in nature and be related to a less common primary site, particularly if one is able to exclude a primary lesion in the lung or breast.

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