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That thrombosis of the lateral or sigmoid sinuses, or the sequelae, may at times be responsible for the clinical signs and symptoms that suggest an intracranial tumor or abscess, especially the latter, is well recognized. When the character or position of the presumed intracranial lesion is not known, it is usually necessary to employ ventriculography in order to clarify both the diagnosis and the localization of the lesion. In practically all of these doubtful cases bilateral papilledema is the outstanding objective finding. Although papilledema is by no means a positive proof, it is a strong presumptive evidence of intracranial pressure.
It is of course possible, with recognized exceptions, to determine by a lumbar puncture whether or not the papilledema is due to increased intracranial pressure. But neurosurgeons have learned by unfortunate experiences that lumbar puncture is fraught with far too much danger to life and function to be used for
DANDY WE. CEREBRAL (VENTRICULAR) HYDRODYNAMIC TEST FOR THROMBOSIS OF THE LATERAL SINUS. Arch Otolaryngol. 1934;19(3):297–302. doi:10.1001/archotol.1934.03790030002001
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