Comedo naevus on the back (EN-patient1)
Keywords: 76 years, Comedo naevus, Comedone naevus, Female, Hair follicle naevus, Keratin-filled follicles, Nevus comedonicus, Scapula, Trunk
An epidermal naevus is due to an overgrowth of the epidermis. Lesions are present at birth (50%) or develop during childhood (mostly in the first year of life). The abnormality arises from a defect in the ectoderm, the outer layer of the embryo that gives rise to epidermis and neural tissue.
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