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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.
Of the nine melanomas, five were in the same body area as the Becker's nevus, with only one occurring within the nevus itself. As this was apparently the first documented co-occurrence of the two diseases, there is so far no evidence of higher malignancy rates in Becker's nevi versus normal skin.
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.
A Spitz nevus is a benign skin lesion.A type of melanocytic nevus, it affects the epidermis and dermis. [1]It is also known as an epithelioid and spindle-cell nevus, [2] and misleadingly as a benign juvenile melanoma, [2]: 691 and Spitz's juvenile melanoma [3]).
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 ...
Schimmelpenning syndrome is a neurocutaneous condition characterized by one or more sebaceous nevi, usually appearing on the face or scalp, [1] associated with anomalies of the central nervous system, ocular system, skeletal system, cardiovascular system and genitourinary system.
However, a melanocytic nevus is benign, and melanoma is malignant. Most melanocytic nevi never evolve into a cancer, with the lifetime risk for an individual nevus being 1 in 3000 for men and 1 in 11 000 for women. [5] Moreover, dermatologists have a standardized system for determining whether a skin lesion is suspicious for malignant melanoma.
It is typically linked to eccrine duct dilatation. Differential diagnoses include inflammatory linear verrucous epidermal nevus, porokeratosis plantaris discreta, nevus comedonicus, linear psoriasis, linear epidermal nevus, spiny keratoderma, congenital unilateral punctate porokeratosis, linear porokeratosis, and porokeratosis of Mibelli. [6]