This patient was submitted to a resection of the posterior fossa tumor and the diagnosis was confirmed as metastatic adenocarcinoma. 

In cases like this one, where we have a solitary lesion in the cerebellar hemisphere in an older adult, there are not a lot of differential diagnosis to be considered:

• metastasis: the most common, by far. 
• hemangioblastoma: the most common primary tumor in this age group; the majority present as a non-enhancing cyst associated with enhancing mural nodule. Solid tumor with blood products, as in this case, can also be a less common presentation.
• astrocytomas: are really rare in the posterior fossa. 

Although not frequent, colorectal adenocarcinoma can produce hemorrhagic metastases like in this case.