Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Disseminated superficial actinic porokeratosis ?
    ### Response:
    Disseminated superficial actinic porokeratosis (DSAP) is a skin condition that causes dry patches. It is characterized by a large number of small, brownish patches with a distinctive border, found most commonly on sun-exposed areas of the skin (particularly the arms and legs).
    