Idiopathic simply means, of unknown origin/cause, so Idiopathic Intracranial Hypertension = Increased Pressure Inside the Skull, Without a Known Cause.

A “mass effect” is what happens when any additional mass exists inside the skull that takes up space (space-occupying mass). Examples of such masses include cranial cysts/tumors, hydrocephalus, or any factor causing edema (such as trauma, infection, disease, or an adverse reaction to certain medications).

IIH was previously called such terms as “Pseudotumor Cerebri” (PTC) and “Benign Intracranial Hypertension” (BIH), because the increased pressure was such that it would suggest the presence of a tumor. Some medical professionals still use these outdated terms.

Despite all the associated name changes, one thing remains clear and is somewhat indisputable, Intracranial Hypertension (IH) can cause a pushing effect on the cerebellar tonsils, causing an Acquired Chiari malformation, AND the blockage of fluid associated with a Chiari Malformation increases Intracranial Hypertension, so it is an evolving circle until a successful treatment stops the pressure.

Because of this evolving circle, some doctors are recommending decompression surgery as a first-line treatment for an Acquired Chiari malformation/Intracranial Hypertension combination. We recommend talking to your doctor about treating the high pressure (pushing down on the brainstem and cerebellum) before removing the only bone trying to hold your brain in your skull. Failure to deal with the pressure prior to decompression can lead to an increased risk of post-surgical complications and ultimately a failed decompression.

Top Symptoms Associated with IH/IIH: https://chiaribridges.org/glossary/symptoms-of-intracranial-hypertension/

For more information on IH/IIH, or to find out why we absolutely recommend that the high pressure be dealt with BEFORE DECOMPRESSION, see: https://chiaribridges.org/brain-pressure-understanding-intracranial-hypertension/