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1 The Neuroradiology Section of the Department of Radiology, Albert Einstein College of Medicine, New York, New York, Departments of Radiology and Neurosurgery, St. Vincent's Hospital and Medical Center of New York, New York
2 The Neuroradiology Section of the Department of Radiology, Albert Einstein College of Medicine, New York, New York
3 Departments of Radiology and Neurosurgery, St. Vincent's Hospital and Medical Center of New York, New York
Changes occur in the roentgenologic anatomy of the ventricular system and sub-arachnoid spaces, depending upon the position of the head. These changes, influenced by gravity, are most marked when there is a significant disproportion between the volume of the cranial vault and the cerebral tissue, and may simulate mass lesions.
Three cases are reported where these changes were of sufficient magnitude to cause confusion in diagnosis.
The pertinent literature on the subject is reviewed.
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