Which type of hydrocephalus is characterized by supratentorial ventriculomegaly with a normal-appearing fourth ventricle on imaging?

Communicating hydrocephalus is characterized by enlargement of the lateral and third ventricles while the fourth ventricle remains normal in size. Key diagnostic features include the presence of ventriculomegaly without obstruction at the level of the fourth ventricle or aqueduct. Clinically, it may present with symptoms of increased intracranial pressure or gait disturbances. A common pitfall is confusing it with non-communicating hydrocephalus, where there is an obstruction leading to dilation proximal to the blockage.