In children, most cases are associated with neuroblastoma and most of the others are suspected to be associated with a low-grade neuroblastoma that spontaneously regressed before detection. In adults, most cases are associated with breast carcinoma or small-cell lung carcinoma. It is one of the few paraneoplastic (meaning 'indirectly caused by cancer') syndromes that occurs in both children and adults, although the mechanism of immune dysfunction underlying the adult syndrome is probably quite different. It is hypothesized that a viral infection (perhaps St. Louis encephalitis, Chikungunya, Epstein-Barr, Coxsackie B, enterovirus, or just a flu) causes the remaining cases, though a direct connection has not been proven. Rare cases of<unk>  associated with Lyme disease have also been reported.<unk>  is not generally considered an infectious disease.<unk>  is not passed on genetically.
Opsoclonus myoclonus syndrome
Benign hereditary chorea
Parkinson-plus syndrome
Progressive supranuclear palsy
Sydenham's chorea
Huntington's disease-like syndrome
Post-encephalitic parkinsonism
Paroniria