A congenital nevus, also known as a mole, is a type of pigmented birthmark that appears at birth or during a baby’s first year. These occur in 1% to 2% of the population. These moles are frequently found on the trunk or limbs, although they can appear anywhere on the body.

The pigmented hairy epidermal nevus (Becker) is a variety of epidermal nevus in which epidermal thickening may be minimal and hairiness and pigmentation obvious. Characteristically it is a unilateral lesion of the shoulder in males but it may affect other sites, be multiple and bilateral, and be found in women and Negroes.

Becker’s nevus with associated smooth muscle proliferation. Figure 5. Becker’s nevus demonstrates fusion and flattening of the rete bases, mild hyperkeratosis, basalar hyperpigmentation and a few characteristic “rectangular” rete ridges. Nevi are much more than simply dark skin. Besides producing increased pigmentation, the area covered by a melanocytic nevus often produces increased amounts of hair.It can often look like a very large mole or a large birthmark. The formation of sweat glands can be disrupted in nevi – so sometimes a person with a large nevus may not sweat where their nevus is located. Becker's nevus or melanosis is an acquired pigmented hairy nevus with both epidermal and dermal components, commonly seen in males.

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DISCUSSION. Faun tail nevus is a rarely reported congenital cutaneous. condition, characterized by the abnormal growth of a. tuft of hair, in the midline, affecting the lumbosacral. region. This Becker's nevus is also known as Becker's melanosis, Becker's pigmentary hamartoma and pigmented hairy epidermal nevus. It is a skin disorder which affects predominantly males.

Congenital melanocytic naevi present as single or multi-shaded, round or oval-shaped pigmented patches. They may have increased hair growth (hypertrichosis). The surface may be slightly rough or bumpy. Congenital naevi usually enlarge as the child grows but they may sometimes become smaller and less obvious with time.

Fried-egg naevus is a compound naevus with a flat rim of pigment around a bumpy central portion – the bump can be lighter or darker than the pigmented rim. Lentiginous naevi are small, dark brown or black, flat lesions, often with a slightly paler rim – people with multiple lentiginous naevi have been said to have cheetah phenotype . Giant pigmented nevus: Large, pigmented, often hairy congenital nevi.

Nevi are much more than simply dark skin. Besides producing increased pigmentation, the area covered by a melanocytic nevus often produces increased amounts of hair.It can often look like a very large mole or a large birthmark. The formation of sweat glands can be disrupted in nevi – so sometimes a person with a large nevus may not sweat where their nevus is located.

It can also be  Atypical sacral dimples are >2.5 cm from the anus, have a diameter >5 mm, and may be associated with other cutaneous markers.

The formation of sweat glands can be disrupted in nevi – so sometimes a person with a large nevus may not sweat where their nevus is located. A congenital nevus, also known as a mole, is a type of pigmented birthmark that appears at birth or during a baby’s first year. These occur in 1% to 2% of the population. These moles are frequently found on the trunk or limbs, although they can appear anywhere on the body.
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This Becker's nevus is also known as Becker's melanosis, Becker's pigmentary hamartoma and pigmented hairy epidermal nevus. It is a skin disorder which affects predominantly males.

➢ Common. Feb 25, 2021 Get information about birthmark pigmentation, color changes and health risks of birthmarks.
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To the Editor: Woolly hair nevus is a rare abnormality of the scalp hair that usually appears at birth or during the first 2 years of life ( 1 ). A 9‐year‐old girl presented with a patch of abnormal hair over her scalp since birth. She had some difficulty in combing the affected area. The patch has proportionately increased in size with her age and was associated with psychosocial problems

2017-12-11 Localized areas of hypertrichosis can be seen in congenital pigmented nevi, Becker's nevus, overlying a neurofibroma, scrotal hair, 1188 hairy pinnae, hairy elbows (OMIM 139600), 1178,1189 anterior and posterior cervical hypertrichosis (OMIM 239840), 1178,1190,1191 nevoid hypertrichosis, 1192,1193 spinal dysraphism (‘faun-tail’), 1194,1195 ectopic cilia, 1196 and in depigmented 2020-06-07 The clinical differential diagnosis for a pigmented nevus in the oral cavity may include a melanotic macule, amalgam tattoo, oral melanoacanthoma, and early melanoma. Typically, biopsy of a persistent, unexplained pigmented lesion of the oral mucosa should be considered in order to rule out malignancy.

Becker's nevus or hairy pigmented epidermal nevus is a benign cutaneous Figure 2: Hyperpigmented patch with tuft of hairs suggestive of Becker's nevus

Lentiginous nevus nevus with eccentric pigmentation: Lentiginous nevi are small, dark brown or black, flat lesions, often with a slightly paler rim – people with multiple lentiginous naevi have been said to have cheetah 2020-10-14 · Aside from recurrently dyeing the non-pigmented hair, you can go for an epidermal grafting on the affected region. Moles on the hair scalp. A dark-pigmented region on the scalp can be an indication of a mole or nevus. There are people born with this rare condition (about 1 in every 100 newborns). They are not a sign of an injury in a past life. Circle hair (CH) is an interesting subtype of ingrown hair, characterized by the growing of hair shaft in a spiral or circular morphology underneath a translucent layer of stratum corneum, parallel to skin surface.

There is often less fat tissue under the skin of the nevus; the skin may appear thinner there than over other areas of the body. People with giant congenital melanocytic nevus may have more than one nevus (plural: nevi). The other nevi are often smaller than the giant nevus.