Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Chromosome 1q41-q42 deletion syndrome ?
    ### Response:
    Chromosome 1q41-q42 deletion syndrome is characterized by a small, but variable deletion in a particular place on the long arm of one copy of chromosome 1, usually spanning several genes. There have been variable features described in the literature, and individuals have ranged from being mildly to severely affected.
    