Pineal toxoplasmosis mimicking pineal tumor in an AIDS patient.

A pineal mass in a patient with acquired immunodeficiency syndrome (AIDS) is reported. Computed tomography (CT) scan revealed a nodular mass in the pineal region with foci of calcification and obstruction of the aqueduct mimicking a pineal tumor. At autopsy, the brain revealed a well-circumscribed lesion with central necrosis in the pineal region suggestive of toxoplasma and involving the periaqueductal area.

CT features of primary cerebral lymphoma in AIDS and non-AIDS patients.

Computed tomographic study of six cases with primary cerebral non-Hodgkin lymphoma are reviewed. Three had a history of intravenous drug abuse and were diagnosed as having acquired immunodeficiency syndrome (AIDS). All cases presented with space occupying lesions in the frontal lobe with the exception of Case 4.

Third ventricular primary cerebral neuroblastoma. Electron-microscopic and immunohistochemical study.

A case of third ventricular primary cerebral neuroblastoma with secondary hydrocephalus is reported. Light microscopy showed a cell pattern that resembled either ependymoma or oligodendroglioma. The tumor was confirmed to be neuroblastoma by electron microscopy and immunohistochemistry.

Epidural angiolipoma with spinal cord compression.

A case of epidural angiolipoma is reported. This tumor rarely occurs in the spinal canal. The most common location is in the thoracic region, and its histogenesis is probably congenital.