McLeod syndrome is an X-linked multisystem disorder including the CNS (chorea, epilepsy), the PNS (axonal polyneuropathy), and the blood cells (acanthocytosis of the erythrocytes) characterized by late onset abnormalities in the neuromuscular and hematopoietic systems. Mild myopathy is a common manifestation in most cases. Patients often present with mild, asymptomatic hyperCKemia. The absence of the membrane transport protein XK seems to be causative.
