Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Chromosome 19p deletion ?
    ### Response:
    Chromosome 19p deletion is a chromosome abnormality that occurs when there is a missing (deleted) copy of genetic material on the short arm (p) of chromosome 19. The severity of the condition and the signs and symptoms depend on the size and location of the deletion and which genes are involved.
    