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[Trigeminal involvement as the presentation of syringomyella and of an abnormality of the occipito-vertebral junction (author's transl)].

Trigeminal involvement in syringomyelia or in a malformation of the occipito-vertebral junction may rarely be the presenting feature of the disorder. Two cases are reported: in the first, recurrent pruritus of the side of the nose due to sensory involvement of CN V was the presenting feature of syringomyelia; in the second, a malformation of the occipito-vertebral junction presented with refractory and painful trismus by irritation of the motor part of the trigeminal nerve.