May Be Caused by

 Common

Glioma

Hemorrhage

Metastasis

 Uncommon

Abscess

Acute infarction

Encephalitis

Ependymoma

Epidermoid

Hamartoma

Hemangioblastoma

Lipoma

Lymphoma

Medulloblastoma

Multiple sclerosis

Paracoccidioidomycosis

Sarcoidosis

Syringobulbia

Teratoma

Tuberculosis

Vascular anomaly