Pseudotumor cerebri.

Pseudotumor cerebri is a disorder affecting mainly young, obese women. There is no known cause or single pathophysiologic mechanism to explain the disorder. The diagnosis is based on the triad of: (1) papilledema, (2) elevated intracranial pressure with a normal cerebrospinal fluid constituency, and (3) normal central nervous system imaging studies. Treatment involves various maneuvers to lower the intracranial pressure, including medicine and surgery.