Acanthocytosis, normolipoproteinaemia and multiple tics.

A chronic degenerative neurological disorder is described which is characterized by tics, grimacing, involuntary movements, a severe disturbance of swallowing and a concurrent malformation of the erythrocytes. This condition is clearly different from familial hypo-betalipoproteinaemia and abetalipoproteinaemia, the two previously described neurological disorders associated with abnormal red cells.