Chorea complicating polycythemia rubra vera

A patient with polycythemia rubra vera and chorea is described and the literature on this rare combination is reviewed. This is the first report of the association of chorea and polycythemia in a male patient.The contrasting features of other forms of diffuse cerebral pathology which may be accompanied by chorea, namely disseminated lupus erythematosus, Henoch-Schönlein purpura and rheumatic chorea, are discussed.