Antibodies against collapsin response mediator protein 5 (CRMP5-IgG) have been identified as markers of a wide range of neurological paraneoplastic autoimmunities, presenting as myelopathy, cranial neuropathies, polyneuropathies with painless mixed axonal-demyelinating patterns, and basal ganglionitis [28]. This evidence concerns the gene DPYSL5 and polyneuropathy.