Also known as chilblains.

    Clinical Features:


    • Caused by exposure to cold
    • Red to purple macules, papules or nodules on acral skin or the thighs or buttocks

    Histologic Features:


    • Superficial and deep perivascular lymphocytic infiltrate
    • Marked edema of the papillary dermis
    • Edema of blood vessel with transmural lymphocytic infiltrates
    • Occasional fibrin thrombi in the capillaries of the dermal papillae
    • The epidermis is usually unremarkable, but epidermal necrosis or ulceration may sometimes be seen.
    External Links:


    Cases associated with this book:

  • Perniosis
    Author: Stephen Lyle, M.D., Ph.D.

    Conference: Dr. Z's Consultations
  • Perniosis
    Author: Artur Zembowicz M.D. Ph.D.

    Conference: Teaching Collection