AMPH and paraneoplastic neurologic syndrome: Nevertheless according to Graus F. et al [16], PM, a "nonclassical" paraneoplastic neurologic syndrome in that study, is possibly paraneoplastic, even if "well-characterized" paraneoplastic antibodies (anti-Hu, CV2, Ri, Ma2, and amphiphysin) are absent, provided that it occurs within two years of malignancy.