Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Cutaneous mastocytosis ?
    ### Response:
    How is cutaneous mastocytosis diagnosed? A diagnosis of cutaneous mastocytosis is typically suspected based on the presence of suspicious signs and symptoms. A skin biopsy that reveals a high number of mast cells (immune cells that are important for the inflammatory response) confirms the diagnosis.
    