Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) pilomatricoma ?
    ### Response:
    Pilomatricoma, also known as pilomatrixoma, is a type of noncancerous (benign) skin tumor associated with hair follicles. Hair follicles are specialized structures in the skin where hair growth occurs. Pilomatricomas occur most often on the head or neck, although they can also be found on the arms, torso, or legs.
    