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For all talk related to Psuedo Tumor Cerebri (PTC) (Pseudotumor Cerebri ). You can share your experience, ask questions, give answers, support others or get support.

Pseudotumor Cerebri (PTC), is also known as Benign Intracranial Hypertension (BIH), and Idiopathic Intracranial Hypertension.

Pseudotumor cerebri (PTC) is encountered most frequently in young, overweight women between the ages of 20 and 45. Headache is the most common presenting complaint, occurring in more than 90 percent of cases. Dizziness, nausea, and vomiting may also be encountered, but typically there are no alterations of consciousness or higher cognitive function. Tinnitus, or a "rushing" sound in the ears, is another frequent complaint. Visual symptoms are present in up to 70 percent of all patients with PTC, and include transient visual obscurations, general blurriness, and intermittent horizontal diplopia. These symptoms tend to worsen in association with Valsalva maneuvers and changes in posture. Reports of ocular pain, particularly with extreme eye movements, have also been noted.


Pathophysiology

Pseudotumor cerebri is a syndrome disorder defined clinically by four criteria: (1) elevated intracranial pressure as demonstrated by lumbar puncture; (2) normal cerebral anatomy, as demonstrated by neuroradiographic evaluation; (3) normal cerebrospinal fluid composition; and (4) signs and symptoms of increased intracranial pressure, including papilledema.

While the mechanism of PTC is not fully understood, most experts agree that the disorder results from poor absorption of cerebrospinal fluid by the meninges surrounding the brain and spinal cord. The subsequent increase in extracerebral fluid volume leads to elevated intracranial pressure. However, because the process is slow and insidious, there is ample time for the ventricular system to compensate and this explains why there is no dilation of the cerebral ventricles in PTC. Increased intracranial pressure induces stress on the peripheral aspects of the brain, including the cranial nerves. Stagnation of axoplasmic flow in the optic nerve (CN II) results in papilledema and transient visual obscurations; when the abducens nerve (CN VI) is involved, the result is intermittent nerve palsy and diplopia.

Many conditions and factors have been proposed as causative agents of PTC, including excessive dosages of some exogenously administered medications (e.g., vitamin A, tetracycline, minocycline, naladixic acid, corticosteroids), endocrinologic abnormalities, anemias, blood dyscrasias, and chronic respiratory insufficiency.

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