Several antineuronal antibodies have been round in patients with neuro
logical paraneoplastic syndromes. In the past year the spectrum of cli
nical manifestations associated with these antibodies has expanded. Ne
w information on the characteristics of the inflammatory infiltrates i
n the nervous system of affected patients, and on the function and dis
tribution of the neuronal antigens has become available. Studies have
examined the possible role of antibodies in the pathogenesis of parane
oplastic disorders.