DPYSL5 and small cell lung carcinoma: Most SCLC patients have anti-Hu (also known as anti-neuronal nuclear antibody type 1 [ANNA-1]) or CV2/collapsin-responsive mediator protein-5 (CRMP5) antibodies in their serum and cerebrospinal fluid (CSF) [6, 7], and these patients are more likely to develop other manifestations of paraneoplastic encephalomyelitis.