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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 23:1356-1358, September 2002
© 2002 American Society of Neuroradiology

Case Report
BRAIN

Prominent Matched Hypoperfusion in an Intact Cerebellum after a Solitary Middle Cerebellar Peduncle Infarct

Masashi Takasawa^a,b, Kazuo Kitagawa^a,b, Toshiho Ohtsuki^a,b, Naohiko Oku^a,c, Kazuo Hashikawa^a,c, Saburo Sakoda^a, Masatsugu Hori^b and Masayasu Matsumoto^a,b

^a Department of Neurology and Cerebrovascular Disease, Osaka University Hospital, Osaka, Japan
^b Division of Strokology, Department of Internal Medicine and Therapeutics, Osaka University Graduate School of Medicine, Osaka, Japan
^c Department of Nuclear Medicine, Osaka University Graduate School of Medicine, Osaka, Japan

Address reprint requests to Masashi Takasawa, MD, Division of Strokology, Department of Internal Medicine and Therapeutics, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita City, Osaka, 565-0871, Japan

Summary: We examined the cerebellar metabolism of a 61-year-old man with a small infarct in the left middle cerebellar peduncle and an intact cerebellum. Positron emission tomographic images obtained 28 days after onset showed prominent hypoperfusion and hypometabolism (almost 50% below the normal level) in the left cerebellar hemisphere. This case report shows that neural deafferentation may cause prominent hypometabolism without morphologic changes in the cerebellum. An arrest in synaptic activity may be the most important factor for the adaptive decrease in oxygen metabolism seen in ischemic brain.