Leptomeningeal lipomatous hamartoma overlying a midline cleft of the ventral pons.

Intracranial lipomatous hamartomas (lipomas) are of maldevelopmental nature and have a predilection for the midsagittal plane. They are often associated with malformations of the CNS and other organ systems. It is reported an asymptomatic lipomatous hamartoma of the ventral pontine leptomeninges and a midline cleft of the subjacent pons discovered incidentally at autopsy of an 80-year-old man. Review of the literature shows that this type of lesion at the ventral pons has not been reported previously.