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A fine structural study of a myxopapillary ependymoma of the filum terminale confirms and emphasizes the distinctive morphological features of this tumor. Electron basement membrane production were identified. It is suggested that they are related to the growth of ependymal tumor cells in juxtaposition to the collagen normally present in the conus(More)
We compared the effects of glucose injection with those of saline or mannitol on ischemic brain damage and brain water content in a four-vessel occlusion (4-VO) rat model, which simultaneously causes severe forebrain ischemia and moderate hindbrain ischemia. Glucose given before onset of ischemia was followed by severe brain injury, with necrosis of the(More)
Explants of a myxopapillary ependymoma were grown on collagen-coated coverslips and in organ culture systems using gelfoam sponge matrices and Millipore filter platforms. The tumor cultured on collagen-coated coverslips initially exhibited the cytologic features of simple uni- and bipolar glial cells and later developed an epithelial-like pattern. Delicate(More)
We studied 10 patients who survived for 2 to 8 weeks in a vegetative state, including 8 with cardiopulmonary failure and 2 with subarachnoid hemorrhage. Within days of onset, they regained brainstem function and awoke, but none had evidence of cognitive awareness. All patients opened their eyes within 2 weeks, and eight had roving conjugate eye movements.(More)
This report presents the findings of a study of a 17-year-old male with a selective immunodeficiency to the Epstein-Barr virus, who died of a malignant lymphoma following clinical infectious mononucleosis. Autopsy findings and immunohistochemical techniques demonstrated a malignant lymphoma with B-lymphocyte characteristics which primarily involved the(More)
To determine whether the production of brain ischemia is modified by antiplatelet agents administered at the time of extracranial endothelial injury, we modified a four-vessel occlusion rat model so that an electrogenic platelet thrombus in one carotid artery produced cerebral ischemia. DC current was passed through an anode around the left carotid artery(More)
One hundred twenty-six fluids from 98 patients with malignant lymphomas have been examined cytologically. The overall accuracy was 88 per cent with only one false positive in 126 fluids. False negatives were highest in the cerebrospinal fluid, which may reflect poor exfoliation of malignant lymphoma cells when the leptomeninges are involved. We have found(More)