deficiencies of vitamin b 1 , b 2 or b 6 were also found in patients with intestinal malabsorption and polyneuropathy , diabetic polyneuropathy , optic atrophy , myelopathy and cerebellar ataxia of unknown etiology , neurological manifestations of neoplasms arising outside the nervous system , b 12 myeloencephalopathy and thevenard 's syndrome .
C0152025
polyneuropathy
C0027763
nervous system