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INTRODUCTIONrnAt present, multffocal motor neuropathy(MMN) is being graduallyrecognized, but domestic reports are rare and there is some difficultyin clinical diagnosis. The chnical manifestations are chronic asym-metric motor dysfunction, physiological characteristics of multifocalcondution blocking. Because increasing of serum GM1 antibody titreis often complicated, many authors think that it is a kind of periph-eral neuropathy mediated by immune. The following is the datasummary of 15 cases of MMN.rn