Acinar choroid plexus adenoma of the fourth ventricle.

Mucus-secreting adenomas of the choroid plexus are very rare. We report the case of a 72-year-old woman who was first seen because of difficulty in walking. Her CT scan showed a lesion compatible with the appearance of a cystic mass in the fourth ventricle. A posterior fossa exploration was performed and an acinar choroid plexus adenoma of the fourth ventricle was removed.