Brain Metastases from Ewing's Sarcoma. A Report of Two Cases and Review of the Literature.

Ewing's sarcoma accounts for approximately 30% of primary malignant bone tumors, mainly in children and young adults. At the time of diagnosis many patients already have metastatic spread of the disease, most often to the lungs and skeletal system. Intracerebral metastases are rare - the reported incidence is up to 4.3%. We describe two cases of metastatic deposits within the brain tissue. Signal intensity of the lesions was similar to that of meningioma on all sequences. Strong homogenous enhancement after gadolinium administration was also similar to meningioma.