Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) sialidosis ?
    ### Response:
    Sialidosis is a severe inherited disorder that affects many organs and tissues, including the nervous system. This disorder is divided into two types, which are distinguished by the age at which symptoms appear and the severity of features.  Sialidosis type I, also referred to as cherry-red spot myoclonus syndrome, is the less severe form of this condition.
    