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A Becker naevus (nevus in American English) is a late-onset epidermal naevus or birthmark characterised by a large brown patch and occurs mostly in males. Also referred to as Becker melanosis and Becker pigmentary hamartoma, it is an overgrowth of the epidermis (upper layers of the skin), pigment cells (melanocytes), and hair follicles.
View pictures of Becker naevus (nevus) in the gallery below. Becker naevus is due to the overgrowth of the epidermis, melanocytes, and hair follicles. Search DermNet Ctrl K
An epidermal naevus usually arises on the trunk and limbs and is uncommon on the face or scalp. The majority are linear epidermal naevi — they form a line, usually just on one side of the body (unilateral, also known as naevus unis lateralis). When they first appear at birth or in infancy, they are flat tan or brown marks, but as the child ...
An epidermal naevus is a type of birthmark in which there is an overgrowth of one or more components of the epidermis or outer layer of skin. Epidermal naevus syndromes refer to the co-existence of a keratinocytic epidermal naevus or an organoid naevus with other abnormalities in the skin and other organs. They are sometimes called systematised ...
A comedo naevus (comedo nevus), also known as naevus comedonicus, is a rare, benign, cutaneous anomaly consisting of grouped, dilated follicular openings containing soft, dark keratin that resemble comedones. Some authorities consider it to be a hamartoma arising from pilosebaceous follicles; others consider it to be an epidermal naevus ...
Keratosis pilaris is a very common, dry skin condition caused by keratin accumulation in the hair follicles. The Latin term keratosis means ‘ scaly skin’, and pilaris means ‘hair’. Keratosis pilaris usually starts in childhood but becomes more obvious during the teenage years and adulthood. It is harmless and is not infectious.
A naevus (American spelling nevus, nevi) is a circumscribed and stable malformation of a component of the skin. Naevi (American spelling nevi) are often present at birth, when they are often called brown birthmarks. Naevi composed of melanocytes (the pigment cells that produce melanin) are called melanocytic naevi or pigmented naevi.
Melanocytic and vascular naevi are generally the most common types of birthmarks. Epithelial naevi. Dermal/subcutaneous naevi. Melanocytic naevi. Congenital melanocytic naevi. Acquired naevi (moles) Blue naevi. Halo naevi. Naevus of Ito and naevus of Ota.
Atzmony L, Ugwu N, Hamilton C, et al. Inflammatory linear verrucous epidermal nevus (ILVEN) encompasses a spectrum of inflammatory mosaic disorders. Pediatr Dermatol. 2022;39(6):903-907. doi:10.1111/pde.15094 Journal
The common blue naevus is a solitary, bluish, smooth surfaced macule, papule or plaque. They are generally round or oval in shape. The common blue naevus is usually 0.5–1 cm in diameter. The cellular blue naevus is more nodular and is at least 1 cm in diameter. The colour of blue naevi can also vary, usually being composed of blue to grey ...