Cerebellar stroke syndrome is a condition in which the circulation to the cerebellum is impaired due to a lesion of the superior cerebellar artery, anterior inferior cerebellar artery or the posterior inferior cerebellar artery.Cardinal signs include vertigo, headache, vomiting, and ataxia. Cerebellar strokes account for only 2-3% of the 600,000 strokes that occur each year in the United States. They are far less common than strokes which occur in the cerebral hemispheres. In recent years mortality rates have decreased due to advancements in health care which include earlier diagnosis through MRI and CT scanning. Advancements have also been made which allow earlier management for common complications of cerebellar stroke such as brainstem compression and hydrocephalus.Research is still needed in the area of cerebellar stroke management; however, several factors may lead to poor outcomes in individuals who have a cerebellar stroke. These factors include:

Declining levels of consciousness
New signs of brainstem involvement
Progressing Hydrocephalus
Stroke to the midline of the cerebellum (a.k.a. the vermis)

References
Further reading
Macdonell, R.A.; Kalnins, R.M. ; Donnan, G.A. (1987). "Cerebellar infarction: Natural history, prognosis, and pathology". Stroke. 18 (5): 849–55. doi:10.1161/01.STR.18.5.849. PMID 3629642. Edlow, J.A. ; Newman-Toker, D.E. ; Savitz, S.I. (2008). "Diagnosis and initial management of cerebellar infarction". The Lancet Neurology. 7 (10): 951–64. doi:10.1016/S1474-4422(08)70216-3. PMID 18848314. S2CID 25118582. Norrving, Bo (2014). Oxford Textbook of Stroke and Cerebrovascular Disease. Oxford University Press. pp. 90–1. ISBN 9780199641208. Nowe, Tim; Jütter, Eric (2014). "Ch. 17: Critical Care of Cerebellar Stroke". In Schwab, Stefan; Hanley, Daniel; Mendelow, A. David (eds.). Critical Care of the Stroke Patient.
Cambridge University Press. pp. 206–25. ISBN 9780521762564. Manto, Mario Ubaldo (2010). "Ch. 8: Cerebellar Stroke". Cerebellar Disorders: A Practical Approach to Diagnosis and Management. Cambridge University Press. pp. 88–101. ISBN 9780521878135. External links

Image of cerebellar stroke
Images of cerebellar stroke at MedPix