Exceptional symptomatology of a lipoma beneath the third ventricular floor and successful neuroendoscopic treatment.

The aim of this paper is to present the exceptional case of a lipoma located beneath the floor of the third ventricle in front of right mamillary body manifesting with psychiatric symptoms and treated by navigated neuroendoscopy. A 58-year-old male was referred for neurosurgical treatment because of paroxysmal disturbances of consciousness accompanied by aggressive behaviour. Because electroencephalographic evaluation failed to confirm the epileptic origin of the presenting symptoms, the final psychiatric diagnosis was syndrome of amentia.