CDR2 and yolk sac tumor: One was positive for anti-Yo antibodies (with symptom onset of abnormal gait; lesions involving the midbrain, thalamus, basal ganglia and cerebral hemisphere, pontobulbar region, and cervical spinal cord; and the patient was diagnosed with testicular yolk-sac tumors 1 year before the onset of autoimmune GFAP-A, although the testicular yolk-sac tumors improved after corticosteroid therapy and gamma globulin therapy).