Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Huntington disease-like syndrome ?
    ### Response:
    As its name suggests, a Huntington disease-like (HDL) syndrome is a condition that resembles Huntington disease. Researchers have described four HDL syndromes, designated Huntington disease-like 1 (HDL1) through Huntington disease-like 4 (HDL4). These progressive brain disorders are characterized by uncontrolled movements, emotional problems, and loss of thinking ability.
    