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  2. Acanthosis nigricans - Wikipedia

    en.wikipedia.org/wiki/Acanthosis_nigricans

    Acanthosis nigricans is a medical sign characterised by brown-to-black, poorly defined, velvety hyperpigmentation of the skin. [1] It is usually found in body folds, [2] such as the posterior and lateral folds of the neck, the armpits, groin, navel, forehead and other areas. [1]

  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. Everything You Need to Know About Acne, from Causes to ... - AOL

    www.aol.com/everything-know-acne-causes...

    Blackheads (open comedones): Blackheads are small dark brown or black spots, often on the nose and chin. They happen when pores are clogged with sebum and dead skin cells, and are open at the surface.

  5. Phosphene - Wikipedia

    en.wikipedia.org/wiki/Phosphene

    One example of a pressure phosphene is demonstrated by gently pressing the side of one's eye and observing a colored ring of light on the opposite side, as detailed by Isaac Newton. [ 7 ] [ 8 ] [ 9 ] Another common phosphene is "seeing stars" from a sneeze , laughter, a heavy and deep cough, blowing of the nose , a blow on the head or low blood ...

  6. Pseudopupil - Wikipedia

    en.wikipedia.org/wiki/Pseudopupil

    The head of a mantis showing the black pseudopupil in its compound eyes The eye of a mantis shrimp has three regions, each with its own pseudopupil.. In the compound eye of invertebrates such as insects and crustaceans, the pseudopupil appears as a dark spot which moves across the eye as the animal is rotated. [1]

  7. Myasthenia gravis is one of the rarest and most concerning ...

    www.aol.com/myasthenia-gravis-one-rarest-most...

    Because of this, Hesterlee says the disorder "can affect voluntary muscles − particularly those that control eye and eyelid movement, facial expressions, swallowing and breathing."

  8. Heterochromia iridum - Wikipedia

    en.wikipedia.org/wiki/Heterochromia_iridum

    Central heterochromia, green with brown. Central heterochromia is also an eye condition where there are two colors in the same iris; but the arrangement is concentric, rather than sectoral. The central (pupillary) zone of the iris is a different color than the mid-peripheral (ciliary) zone.

  9. AOL Mail

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!