Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Annular atrophic lichen planus ?
    ### Response:
    Annular atrophic lichen planus (LP) is a rare form of lichen planus, which is a condition that affects the skin and/or mouth. In annular atrophic LP, specifically, affected people develop skin lesions with features of both annular LP and atrophic LP - ring-shaped, slightly raised, purple lesions with central atrophy (tissue breakdown).
    