title: Primary brain stem reticulum cell sarcoma causing dementia.
abstract: Primary reticulum cell sarcoma-microgliomas of the brain stem are extremely rare. Described here is an unusual case with profound episodic dementia as the predominant clinical manifestation.
mesh_terms: D001932:Brain Neoplasms / Q000150:complications* / Q000473:pathology; D001933:Brain Stem; D003704:Dementia / Q000209:etiology*; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000150:complications* / Q000473:pathology; D008297:Male; D008636:Mesencephalon / Q000473:pathology; D008875:Middle Aged