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The most extensive study to date, a 1981 survey of nearly 20,000 French males aged 17 to 26, [7] served to disprove many commonly held beliefs about the disorder. In the French study, 100 subjects were found to have Becker's nevi, revealing a prevalence of 0.52%.
Becker's nevus and supernumerary nipples can usually be diagnosed by visually observing the skin. [24] However, if visual observation alone is insufficient to make a conclusive diagnosis, a skin biopsy can be performed. A small sample of skin can be removed from the nevus and examined under a microscope to analyze the cellular components.
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.
Dysplastic nevus syndrome is inherited in an autosomal dominant manner. The penetrance for melanoma in kindreds with CDKN2A mutations is estimated at 58% to 92% by 80 years of age and varies with geography. The penetrance in CDKN2A mutation carriers for pancreatic cancer has been estimated to be 17% by 75 years of age.
Inherited dysplastic nevus syndrome is an autosomal dominant hereditary condition. Dysplastic nevi are more likely to undergo malignant transformation when they occur among members of melanoma families. At least one study indicates a cumulative lifetime risk of nearly 100% in individuals who have dysplastic nevi and are members of melanoma ...
Nevus cells are a variant of melanocytes. [1]: 684 They are larger than typical melanocytes, do not have dendrites, and have more abundant cytoplasm with coarse granules. [2] They are usually located at the dermoepidermal junction or in the dermis of the skin. Dermal nevus cells can be further classified: type A (epithelioid) dermal nevus cells ...
A Mongolian spot, also known as slate grey nevus or congenital dermal melanocytosis, is a benign, flat, congenital birthmark with wavy borders and an irregular shape. In 1883, it was described and named after Mongolians by Erwin Bälz, a German anthropologist based in Japan, who erroneously believed it to be most prevalent among his Mongolian patients.
Nevus lipomatosus superficialis (NLS or NLCS, also known as nevus lipomatosis of Hoffman and Zurhelle [1]) is characterized by soft, yellowish papules or cerebriform plaques, usually of the buttock or thigh, less often of the ear or scalp, with a wrinkled rather than warty surface.