Abstract
McLeod syndrome (MLS) is a rare adult-onset, progressive and incurable X-linked multisystemic disorder characterized by chorea, cognitive decline, seizures, polyneuropathy, myopathy and dilated cardiomyopathy with subsequent heart failure and increased risk for arrhythmia [1]. Variable psychiatric symptoms are common; the presence of acanthocytes on blood smears, elevated CK levels and striatal atrophy are other features. MLS is caused by mutation in the XK gene which encodes a membrane transport protein containing the Kx erythrocyte antigen [1]. So far, less than 200 MLS cases have been reported. In general, women harboring XK mutations rarely manifest symptoms. In addition, myoclonus has not been described in association with MLS and functional imaging studies are scarce.
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