PNMA2 and neoplasm: Other paraneoplastic antibodies are very rare in the pediatric population; a single case with anti-Yo manifested subacute onset cerebellar ataxia (no tumor was found to be associated); MA2 has been identified in a 14-year-old girl with severe encephalopathy, seizures, and status dystonicus; and Tr has been detected in a 12-year-old boy with Hodgkin lymphoma.