Non-tumoral stenosis of the aqueduct in adults.

Nine cases of non-tumoral stenosis of the aqueduct in adults are described. The deformed aqueducts are displayed diagrammatically. Patients may be divided into three groups, according to their presentation; papilledema with raised intracranila pressure, epilepsy, or intellectual impairment. Those patients in the first category tended to be younger, and to respond more favorably to treatment. A review of the literature is made.