✓ A case of cerebral oligodendroglioma with a large metastasis in the spinal cord is reported. The patient had undergone two intracranial operations (1959 and 1961) before the successful removal (1966) of the spinal metastasis, and is still alive.

Superior sagittal sinus thrombosis was diagnosed on computerized tomography (CT) scanning and was subsequently confirmed by angiography in two patients. Small ventricles and filling defects occurring within the sinus (the empty triangle sign) appeared to be highly suggestive of superior sagittal sinus thrombosis, and the association was confirmed angiographically. Potential pitfalls in the CT diagnosis of local obstruction of cerebral venous outflow are described and correlated with the natural history of the disease. The need for improved awareness of the CT appearance of occlusive disease of the dural venous sinuses is stressed.

✓ A case of meningiochondroma of the cerebral convexity is presented. The etiology of this tumor and a review of comparable cases are discussed.