Peduncular hallucinosis: an unusual sequel to surgical intervention in thesuprasellar region

Peduncular hallucinations are formed visual images often associated with sl eep disturbance, and are caused by lesions in the midbrain, pens and dience phalon. In the present study, we report two patients who developed peduncul ar hallucinations following surgery in the suprasellar region. In one of th ese, the peduncular hallucinations were a sequele to endoscopic third ventr iculostomy, while in the other, they were due to diencephalon and mid-brain compression by a postoperative clot following excision of a hypothalamic a strocytoma.