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  2. Schamberg disease - Wikipedia

    en.wikipedia.org/wiki/Schamberg_disease

    Schamberg's disease, or progressive pigmented purpuric dermatosis, is a chronic discoloration of the skin which usually affects the legs and often spreads slowly. This disease is more common in males and may occur at any age from childhood onward. This condition is observed worldwide and has nothing to do with race or ethnic background.

  3. Mongolian spot - Wikipedia

    en.wikipedia.org/wiki/Mongolian_spot

    Mongolian spot is a congenital developmental condition—that is, one existing from birth—exclusively involving the skin. The blue colour is caused by melanocytes, melanin -containing cells, that are usually located in the surface of the skin (the epidermis ), but are in the deeper region (the dermis) in the location of the spot. [6]

  4. Keratosis pilaris - Wikipedia

    en.wikipedia.org/wiki/Keratosis_pilaris

    Keratosis pilaris ( KP; also follicular keratosis, lichen pilaris, or colloquially chicken skin [1]) is a common, autosomal - dominant, genetic condition of the skin's hair follicles characterized by the appearance of possibly itchy, small, gooseflesh -like bumps, with varying degrees of reddening or inflammation. [2]

  5. Purpura - Wikipedia

    en.wikipedia.org/wiki/Purpura

    Specialty. Dermatology, hematology. Purpura ( / ˈpɜːrpjʊərə / [1]) is a condition of red or purple discolored spots on the skin that do not blanch on applying pressure. The spots are caused by bleeding underneath the skin secondary to platelet disorders, vascular disorders, coagulation disorders, or other causes. [2]

  6. Lichen planus - Wikipedia

    en.wikipedia.org/wiki/Lichen_planus

    Dermatology. Lichen planus ( LP) is a chronic inflammatory and autoimmune disease that affects the skin, nails, hair, and mucous membranes. [1] [2] It is not an actual lichen, but is named for its appearance. [3] It is characterized by polygonal, flat-topped, violaceous papules and plaques with overlying, reticulated, fine white scale ( Wickham ...

  7. Port-wine stain - Wikipedia

    en.wikipedia.org/wiki/Port-wine_stain

    Specialty. Medical genetics. A port-wine stain ( nevus flammeus) is a discoloration of the human skin caused by a vascular anomaly (a capillary malformation in the skin). [1] They are so named for their coloration, which is similar in color to port wine, a fortified red wine from Portugal . A port-wine stain is a capillary malformation, seen at ...

  8. Petechia - Wikipedia

    en.wikipedia.org/wiki/Petechia

    pɪˈtiːkɪə. Specialty. Rheumatology. A petechia ( / pɪˈtiːkiə /; [1] pl.: petechiae) is a small red or purple spot (≤4 mm in diameter) that can appear on the skin, conjunctiva, retina, and mucous membranes which is caused by haemorrhage of capillaries. [2] [3] The word is derived from Italian petecchia, 'freckle,' of obscure origin. [1]

  9. Pearly penile papules - Wikipedia

    en.wikipedia.org/wiki/Pearly_penile_papules

    Pearly penile papules (PPP; also known as hirsutoid papillomas or as papillae coronae glandis, [4] Latin for 'papillae of the corona of the glans') are benign, small bumps or spots on the human penis. [2] [3] They vary in size from 1–4 mm, are pearly or flesh-colored, smooth and dome-topped or filiform, and appear in one or, several rows ...