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Longitudinal tan, black, or brown streak on a nail; Pigmentation of proximal nail fold; Areas of dark pigmentation (palms of hands) Warning signs are new areas of pigmentation, or existing pigmentation that shows change. If caught early, acral lentiginous melanoma has a similar cure rate as the other types of superficial spreading melanoma. [12]
Oral pigmentation also be classified as two categories, melanocytic or non-melanocytic. (Melanocytic being the genesis due to the increase in melanotic pigments and non-melanocytic origin being the genesis from non melanotic causes). The prevalence of melanocytic and non-melanocytic causes of oral melanosis was roughly 1:1. [42] [8]
Melanocytic oral lesions are an extremely uncommon condition characterized by pigmented lesions of the mucous membranes. [1]: 807 ...
Melanonychia is a black or brown pigmentation of a nail, and may be present as a normal finding on many digits in Afro-Caribbeans, as a result of trauma, systemic disease, or medications, or as a postinflammatory event from such localized events as lichen planus or fixed drug eruption.
Melanocytic nevus. A melanocytic nevus (also known as nevocytic nevus, nevus-cell nevus and commonly as a mole) [1][2] is usually a noncancerous condition of pigment-producing skin cells. It is a type of melanocytic tumor that contains nevus cells. [2] A mole can be either subdermal (under the skin) or a pigmented growth on the skin, formed ...
Melanocytes are melanin -producing neural crest -derived [3] cells located in the bottom layer (the stratum basale) of the skin's epidermis, the middle layer of the eye (the uvea), [4] the inner ear, [5] vaginal epithelium, [6] meninges, [7] bones, [8] and heart found in many mammals and birds. [9] Melanin is a dark pigment primarily ...
Nevus (pl.: nevi) is a nonspecific medical term for a visible, circumscribed, chronic lesion of the skin or mucosa. [1] The term originates from nævus, which is Latin for "birthmark"; however, a nevus can be either congenital (present at birth) or acquired. Common terms, including mole, birthmark, and beauty mark, are used to describe nevi ...
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 ]