A patient with neurosyphilis presenting as chorea.

Despite the marked decline in frequency of neurosyphilis over the past three decades in the United Kingdom, new cases continue to appear both sporadically and as a complication of HIV infection. There is clinical evidence that neurosyphilis is becoming less typical. We describe a case of neurosyphilis presenting predominantly with choreoathetosis and associated hemiparesis in an otherwise healthy, immunocompetent patient. Only six cases of neurosyphilis presenting with features of basal ganglia damage have been reported in the recent literature, five of whom had HIV infection.