title: Chorea disclosing a polycythemia vera.
abstract: Chorea is a rare complication of polycythemia. We report the case of a 70 year-old woman whose polycythemia vera (PV), with Janus Kinase-2 (JAK2) mutation, presented as chorea. Chorea resolved quickly after hydroxyurea therapy.
authors.affiliation: Department of Neurology, Huadong Hospital, Fudan University, Shanghai, People's Republic of China.
authors.forename: Guidong
authors.initials: G
authors.lastname: Liu
authors.affiliation: Department of Neurology, Huadong Hospital, Fudan University, Shanghai, People's Republic of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Chang
authors.affiliation: Department of Neurology, Huadong Hospital, Fudan University, Shanghai, People's Republic of China.
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Department of Neurology, Huadong Hospital, Fudan University, Shanghai, People's Republic of China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Qiang
authors.affiliation: Department of Neurology, Huadong Hospital, Fudan University, Shanghai, People's Republic of China.
authors.forename: Chunhui
authors.initials: C
authors.lastname: Gu
authors.affiliation: Department of Neurology, Huadong Hospital, Fudan University, Shanghai, People's Republic of China.
authors.forename: Yingying
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Neurology, Huadong Hospital, Fudan University, Shanghai, People's Republic of China.
authors.forename: Wenshi
authors.initials: W
authors.lastname: Wei
keywords: JAK2; chorea; elderly; polycythemia vera
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