[Neurologic symptoms as the first manifestation of Addison-Biermer disease].

A patient was observed who came with the following symptoms persisting for six months: paraesthesia in the lower and upper limbs, weakening of muscle strength, difficulties in walking. The high value of the mean cell volume in blood morphologic examination called attention to the possibility of vitamin B12 deficiency which had not yet manifested itself as anaemia. Further studies confirmed this suggestion. As the result of the treatment with vitamin B12 full normalization of the nervous system condition and results of examinations was achieved.