[A case of amnesia caused by a falx meningioma in the right frontal region].
A 60-year-old right-handed man suffered frontal lobe dysfunction caused by a falx meningioma. He appeared to have amnesia and left hemiparesis. It is note-worthy that he had a lesion of the right frontal region but exhibited both verbal and non-verbal memory impairment, although his intelligence, remote memory and digit span were normal. Computed tomography and magnetic resonance imaging revealed a falx meningioma in the right frontal lobe including the right cingulate gyrus and corpus callosum. Single photon emission CT revealed a wide area of low perfusion surrounding the right frontal lobe including the cingulate gyrus. After surgery, left hemiparesis and amnesia disappeared. SPECT after surgery showed an area of low perfusion limited to the right frontal region. We concluded that the amnesia in this case might be caused by the interruption of hippocampal input into the cingulate gyrus.
Osawa
Aiko
A
Department of Neurological Surgery, Wakayama Medical University, Wakayama 641-0012, Japan.
Maeshima
Shinichiro
S
Chokyu
Isao
I
Tanaka
Satoshi
S
Itakura
Toru
T
D000647:Amnesia / Q000209:etiology*; D004388:Dura Mater; D005625:Frontal Lobe; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000150:complications* / Q000601:surgery; D008579:Meningioma / Q000150:complications* / Q000601:surgery; D008875:Middle Aged