<unk>  is present in 0.5 to 1 per 100,000 of the population.<unk>  males have variable acanthocytosis due to a defect in the inner leaflet bilayer of the red blood cell, as well as mild hemolysis.<unk>  females have only occasional acanthocytes and very mild hemolysis; the lesser severity is thought to be due to X chromosome inactivation via the Lyon effect. Some individuals with<unk>  phenotype develop myopathy, neuropathy, or psychiatric symptoms, producing a<unk>  that may mimic chorea.<unk>  can cause an increase in the enzymes creatine kinase (CK) and lactate dehydrogenase (LDH) found in routine blood screening.
McLeod syndrome
McKittrick-Wheelock syndrome
Flynn–Aird syndrome
CAMFAK syndrome
Fryns-Aftimos syndrome
Danon disease
Rotor syndrome
Dennie–Marfan syndrome