Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Punctate palmoplantar keratoderma type I ?
    ### Response:
    How is punctate palmoplantar keratoderma type I diagnosed? Features that support the diagnosis of punctate palmoplantar keratoderma type I include a positive family history (i.e., other affected family members), the presence of multiple tiny hard rounded bumps of thickened skin on the hands and feet, and certain cell histology (i.
    