Japanese
Title小脳橋角部腫瘤の小脳循環に及ぼす影響 - とくに小脳に対するremote effectの可能性について -
Subtitle原著
Authors玉本文彦*, 桑島賢介*, 白石昭彦*, 京極伸介*, 白形彰宏*, 住幸治*, 片山仁*
Authors(kana)
Organization*順天堂浦安病院放射線科
Journal核医学
Volume30
Number3
Page273-281
Year/Month1993/3
Article原著
Publisher日本核医学会
Abstract「要旨」 小脳橋角部の腫瘤性病変9症例に対して脳血流シンチグラフィを施行し, 病変の部位および両側小脳半球の循環状態を検討した. 中小脳脚に圧排のある5症例中4症例では, 脳血流シンチグラフィ上は病変と同側の小脳半球で循環低下が認められ, 圧排のない4症例中3症例では, 脳血流シンチグラフィ上両側の小脳半球の循環の左右差を認めなかった. 圧排のある5症例中血管造影を施行しえたのは4症例で, 1例に腫瘤と同側の前下小脳動脈が描出されない例があり, 腫瘤による小脳血管の圧排や小脳半球自体への圧迫も脳血流シンチグラフィ所見に影響を与えた可能性が否定できないが, 同時に中小脳脚が皮質橋小脳路の二次ニューロン束の通路であることを考慮すると中小脳脚を圧排する小脳橋角部腫瘤による同側の小脳半球での循環低下には, 皮質橋小脳路の遮断によるremote efrectの関与の可能性も否定できないと考えられた.
Practice臨床医学：一般
KeywordsCerebral blood flow scintigraphy, Crossed cerebellar diaschisis, Remote effect, Cerebellopontine angle tumor, Middle cerebellar peduncle
English
TitleInfluence of Cerebellopontine Angle Tumor on Cerebellar Circulation - Posibility of Remote Effect to the Cerebellum -
SubtitleOriginal Articles
AuthorsFumihiko TAMAMOTO*, Kensuke KUWASHIMA*, Akihiko SHIRAISHI*, Shinsuke KYOGOKU*, Akihiro SHIRAKATA*, Yukiharu SUMI*, Hitoshi KATAYAMA*
Authors(kana)
Organization*Department of Radiology, Juntendo Urayasu Hospital
JournalThe Japanese Journal of nuclear medicine
Volume30
Number3
Page273-281
Year/Month1993/3
ArticleOriginal article
PublisherTHE JAPANESE SOCIETY OF NUCLEAR MEDICINE
AbstractNine cases (4 men and 5 women, ranging in age from 39 to 73 years with a mean age of 51 years) of cerebello-pontine angle tumors were evaluated by cerebral blood flow scintigraphy on the basis of clinico-functional anatomy. In the 4 of 5 cases in which the middle cerebellar peduncle was compressed by the mass, definite hypoperfusion was revealed in the ipsilateral cerebellar hemisphere. On the other hand, in the 3 of 4 cases without compression of the middle cerebellar peduncle, no asymmetric perfusion was seen in either the right or left cerebellar hemisphere. There were neither supratentorial lesions nor signs of increased intracranial pressure in any of the 9 cases. On the vertebral angiograms of the 4 cases with compression of the middle cerebellar peduncle, non-opacification of the ipsilateral anterior inferior cerebellar artery occurred in only one case. There were no definite signs of reduction of cerebellar blood flow in the other 3 cases. The middle cerebellar peduncle is one of the largest bundles of centripetal fibers in the cerebellar hemispheres. Secondary neuronal fibers of the corticopontocerebellar pathway are the most prominent among these fibers. The mass lesion in the cerebellopontine cistern has a tendency to compress the middle cerebellar peduncle and may deactivate the corticopontocerebellar pathway even if it is small. Our data seemed to suggest that hypoperfusion of the cerebellar hemisphere ipsilateral to the lesion compressing the middle cerebellar peduncle can be attributed not only to hemodynamics and/or the effect of the mass on the cerebellar hemisphere itself but also to a remote effect secondary to deactivation of the corticopontocerebellar pathway.
PracticeClinical medicine
KeywordsCerebral blood flow scintigraphy, Crossed cerebellar diaschisis, Remote effect, Cerebellopontine angle tumor, Middle cerebellar peduncle

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