Aqueductal stenosis is a medical condition that refers to the narrowing of the canal that connects the third and fourth ventricles in the brain. This narrowing can cause a build-up of cerebrospinal fluid, leading to pressure on the brain. The use of synonyms can help to describe this condition in different terms, such as cerebral aqueduct stenosis, mesencephalic aqueductal stenosis, or aqueduct of Sylvius stenosis. Other possible alternatives include Sylvian aqueduct stenosis, midbrain aqueductal stenosis, and aqueductal obstruction. These synonyms can be useful for medical professionals to describe this condition accurately and communicate it to patients and other healthcare providers.