[A case of a 16.5-year-old boy with myelosis funicularis caused by secondary vitamin B12 deficiency associated with dietary deficiencies - case report].

Vitamin B12 deficiency can manifest with many illness symptoms, among which dominate those of the hematology, digestive and nervous system. The illness symptoms of vitamin B12 deficiency are often atypical and the early cause diagnosis might be difficult. Hereby it is described a case of a 16.5-year-old boy with myelosis funicularis caused by vitamin B12 deficiency.