Three cases of extracranial metastases from medulloblastomas are presented of a total of 60 cases statistically analyzed. All are postcraniectomy. The most common metastatic site is bone, followed by the lymph nodes, then other soft tissues. Osseous metastases are mainly to the axial skeleton and consist of osteoblastic and osteolytic types, appearing much the same as metastases from breast carcinoma. In one of the cases presented, the first metastasis recognized was to the breast.

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Mediastinal lymphangioma is an uncommon benign tumor accounting for 0.7 to 4.5% of all mediastinal masses. Lymphangiomas consist of dilated cystic lymph spaces lined by single layers of endothelium and do not undergo malignant change. Most mediastinal lymphangiomas are asymptomatic. There are no specific radiological findings. Surgical excision is the treatment of choice and the prognosis is excellent.

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