Linear verrucous nevus syndrome

Linear verrucous nevus syndrome, also known as epidermal nevus syndrome or Solomon syndrome, is a rare congenital disorder characterized by the presence of extensive linear epidermal nevi (warty, streak-like skin growths that follow the lines of Blaschko) in association with abnormalities affecting multiple organ systems, including the skeletal, central nervous, cardiovascular, and ocular systems. The condition is thought to arise from somatic mosaicism, meaning a postzygotic genetic mutation occurs early in embryonic development, affecting only certain cell lines. The hallmark feature is the epidermal nevus itself, which typically presents at birth or in early infancy as a linear, verrucous (wart-like), hyperpigmented plaque on the skin. These nevi can be localized or widespread. Extracutaneous manifestations vary considerably but may include skeletal anomalies (such as limb asymmetry, hemihypertrophy, scoliosis, or bone cysts), neurological abnormalities (seizures, intellectual disability, hemimegalencephaly), ocular defects (colobomas, corneal opacities), and cardiovascular malformations. The severity and combination of features differ widely among affected individuals. There is no cure for linear verrucous nevus syndrome, and management is multidisciplinary and symptom-based. Skin lesions may be treated with surgical excision, laser therapy, or topical retinoids, though recurrence is common. Seizures are managed with antiepileptic medications, and skeletal or cardiac anomalies may require surgical intervention. Regular monitoring by dermatology, neurology, ophthalmology, orthopedics, and cardiology specialists is recommended to address complications as they arise. Genetic counseling is advised, although the condition is typically sporadic and recurrence risk in families is generally low.

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