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  • Title: [A case of multiple sclerosis associated with myelin associated glycoprotein neuropathy].
    Author: Nakane S, Furuya T, Shirabe S, Nakamura T, Yoshimura T.
    Journal: Rinsho Shinkeigaku; 1998 Dec; 38(12):1042-8. PubMed ID: 10349346.
    Abstract:
    A 28-year-old woman had developed chronic, recurrent, visual disturbance (bilateral), and girdle sensation at Th 5-6. She was admitted to our hospital because of left visual disturbance, distal limb weakness on right side, and numbness of four extremities. The neurological examination revealed decreased visual acuity of the left eye with abnormality of the optic disk, moderate muscle weakness of the right upper and lower extremities, absent tendon reflexes and paresthesia on distal portions of the four limbs. Laboratory examinations disclosed the titration of anti-myelin associated glycoprotein (MAG) antibody (IgM) and CSF protein was elevated (104 mg/dl). Motor nerve conduction studies revealed conduction block in more than one nerve. The conduction velocities in the upper and lower extremities were all diminished. P100 latency was prolonged by flash visual evoked potential (VEP) studies. N13-N20 interpeak latency of somatosensory evoked potential (SEP) of median nerve was also prolonged. She was treated with steroid pulse therapy, followed by an oral dose of 30 mg/day of prednisolone. Her symptoms resolved completely three months later, and multifocal conduction block subsided on electrophysiological study. There are some cases of multiple sclerosis with multifocal conduction block, but such a case is very rare in Japan. We discussed the pathogenic mechanisms of these conditions, and we conclude that we must take notice of demyelinating neuropathy in multiple sclerosis and that nerve conduction studies are useful for detecting them.
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