[Two cases of recurrent optic neuritis (OPN) and acute transverse myelopathy (ATM) with associated anticardiolipin antibodies].

We investigated anticardiolipin antibodies (aCL) by enzyme linked immunosorbent assay with adding aCL-cofactor in two cases of recurrent OPN and ATM patients. These two patients had similar clinical features with ATM and OPN during their clinical courses. They were supposed to be suffered with multiple sclerosis (MS), although cranial MRI was normal and oligoclonal IgG band (OCB) was consistently absent in the cerebrospinal fluid. Positive aCL is suggestive that this disease may be a disorder associated with aCL with different etiology and pathogenesis from other MS patients. Serologic testing for aCL with aCL-cofactor should be warranted for MS patients, especially for those showing OPN and ATM during the clinical course, because in orientals the incidence of ATM and OPN is relatively high among MS.