Richter's syndrome is defined as the transformation of low grade lymphoma to more aggressive high grade malignant form, usually diffuse large B cell lymphoma. Primary or metastatic cerebral Hodgkin's lymphoma and Hodgkin's lymphoma variant of Richter transformation are extremely rare. We report a case of 65-year old man who developed isolated intracerebral Hodgkin's lymphoma almost 8 years after the diagnosis of chronic lymphocytic leukemia/small lymphocytic lymphoma, and we reviewed the related literature. The patient had resection of his CNS lesion, followed by radiation and chemotherapy. The patient eventually died with progressive disease.