Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Chorea-acanthocytosis ?
    ### Response:
    Chorea-acanthocytosis is one of a group of conditions called the neuroacanthocytoses that involve neurological problems and abnormal red blood cells. The condition is characterized by involuntary jerking movements (chorea), abnormal star-shaped red blood cells (acanthocytosis), and involuntary tensing of various muscles (dystonia), such as those in the limbs, face, mouth, tongue, and throat.
    