Giant bilateral becker nevus: a rare presentation

An uncommon presentation of segmental Becker's nevus involving the T4 dermatome

This case report explores a rare manifestation of Becker's nevus, where the patient exhibited an unusual dermatomal distribution featuring a hyperpigmented, irregular patch with associated hypertrichosis on the T4 segment. While Becker's nevus is a well-known dermatological condition typically observed in the upper back region, instances of dermatomal distribution are exceptionally uncommon. This case presents a unique occurrence of segmental Becker's nevus, highlighting the atypical presentation of this condition.

Bilateral, Symmetrical, Congenital Becker's Nevus Melanosis: A Rare Presentation and Review of the Literature

Becker's nevus, also known as Becker's melanosis or Becker's pigmentary hamartoma, is a concurrent melanosis first described by S. William Becker. It is a type of acquired hyperpigmentation characterized by well-defined, unilateral lesions with regular borders. It is associated with hypertrichosis and hyperpigmented brownish patches with a mean diameter of 15 cm. The shoulder, scapular area, and upper arms are the most commonly affected areas, but it can occur on any area of the body, including the forehead, face, neck, lower trunk, extremities, and buttocks. The lesion usually appears around puberty, and males are more likely to be affected than females. A 27-year-old male of Arabic descent who was medically free presented to the dermatology clinic complaining of bilateral, symmetrical, hyperpigmented patches on the upper back. The lesions started almost at birth, gradually growing in size and darkening in color over time. On local skin examination, the lesions were bilateral, symmetrical, hyperpigmented patches on the upper back. They were both homogeneous and brown in color with irregular borders and blotchy hyperpigmented macules on both sides of the upper back associated with sparse hair development. Histopathological examination revealed epidermal hyperkeratosis, acanthosis, and focal regular elongation of rete ridges with clubbing. Increased basal layer pigmentation was noticed. The dermis showed focal areas with pigment incontinence. Based on the above clinicopathological findings, the patient was diagnosed with Becker's melanosis. He was referred to the laser clinic for further treatment.

Multiple Becker’s Nevi in a Female Patient Without Musculoskeletal or Developmental Abnormalities: A Case Report and Review of the Literature

Becker's nevus (BN) is one of the cutaneous hamartomatous lesions that often presents as an acquired, single unilateral pigmented hairy patch on the upper trunk, scapular region, or upper arm. Hereby we introduce a 13-year-old girl with the unusual manifestation of BN with multiple acquired, pigmented hairy patches for six months without any musculoskeletal or developmental involvements. After carefully reviewing the literature, to the best of our knowledge, this is the first case in this regard in Iran.

Bilateral Symmetrical Congenital Giant Becker's Nevus: A Rare Presentation

Becker's nevus is a focal epidermal hypermelanotic disorder. It morphologically presents as unilateral, hyperpigmented, hypertrichotic patch on upper trunk, proximal upper extremities and arms. However, Becker's nevus presenting as bilateral, symmetrical patches is rare. Herein, we report a rare case of giant Becker's nevus with bilateral symmetrical presentation in an adult male.

Becker's nevus with neurofibromatosis type 1

Neurofibromatosis type 1 is an autosomal dominant disorder which primarily affects the growth and development of neural cell tissues. It presents as multiple tumor-like growths over the skin that arises from the nerves and is associated with other abnormalities like pigmentation over the skin and bone deformities. Becker's nevus or hairy pigmented epidermal nevus is a benign cutaneous hamartoma which is characterized by hyperpigmented macule with hypertrichosis. It is rarely associated with neurofibromatosis. We report a 22-years-old male with coexistent Becker's nevus and type 1 neurofibromatosis.

Becker nevus syndrome presented with ipsilateral breast hypoplasia

Becker nevus syndrome (BNS) is a rare epidermal nevus syndrome characterized with Becker nevus and ipsilateral breast gland hypoplasia or other skin, skeletal and/or muscle tissue disorders. A 24-year-old woman presented with brown, irregular bordered patch with a diameter of approximately 10 cm which consisted of several small macules on the left breast skin. The ultrasonography and magnetic resonance imaging revealed left breast hypoplasia. Histopathological examination demonstrated minimal acanthosis, papillomatosis, increase in basal layer melanin and hypertrophy of the erector pili muscle. Immunohistochemical staining was positive for androgen in the epidermis, dermal stromal cells and skin appendages. Depending on the clinical and histopathological findings, the patient was diagnosed as BNS. Diagnosis of BNS needs careful examination of pigmented macules and patches since non-hairy BN may be easily overlooked. Patients with BN should be evaluated for associated abnormalities of BNS, in which the severity and extend of ectodermal involvement may differ from patient to other.

Segmental Becker's nevi with mucosal involvement

Becker's nevus otherwise known as Becker's pigmented hairy nevus, is a common melanotic epidermal hypermelanosis. It usually presents as a large unilateral patch of hyperpigmentation and hypertrichosis on the shoulder, chest, or back of an adult man. It can be bilateral or multiple and affect areas other than the usual sites. We report a 16-year-old boy with two Becker's nevi on the left side of the face in a segmental distribution with extension onto the oral mucosa. This case is being reported for its rare presentation.

Becker's nevus syndrome: case report

Becker's nevus is a hyperpigmented macula that is predominantly located on the anterior trunk or on the scapular region, frequently associated with hypertrichosis. The association of Becker's nevus with other cutaneous, musculoskeletal or maxillofacial anomalies has been called Becker's nevus syndrome. We report a case of a 16-year-old girl with a hyperpigmented macula which spread from her right anterolateral trunk to the inner part of her right thigh accompanied by ipsilateral mammary hypoplasia. The skin lesion started when the patient was seven years old when it was also noticed ipsilateral mammary hypoplasia. The histological exam confirmed the clinical hypothesis of Becker's nevus.

Do you know this syndrome? Becker nevus syndrome

Becker nevus syndrome is the association of Becker's nevus with breast hypoplasia and other ipsilateral bone or muscle changes. It is considered to be a hormone-dependent disorder caused by a disturbance in the activity of the androgen receptor that appears to be increased in Becker's nevus, which may influence the development of associated lesions. We present a relevant case of this syndrome due to the rare systematization of the lesions in addition to the exuberant extracutaneous involvement in this case.

Epidermal nevi

Nevi or nests of cells may be made up of a variety of cell types. The cell types that live in the epidermis include epidermal cells or keratinocytes, sebaceous glands, hair follicles, apocrine and eccrine glands, and smooth muscle cells. This article discusses epidermal or keratinocyte nevi, nevus sebaceous, nevus comedonicus, smooth muscle hamartomas, and inflammatory linear verrucous epidermal nevi. Syndromes associated with epidermal nevi are also reviewed.