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A child that has prepubertal hypertrichosis. While hypertrichosis affects men and women equally, hypertrichosis of the ears, hypertrichosis of the nose, and hereditary hypertrichosis primarily affect males. [2] Prepubertal hypertrichosis can be present at birth or develop later on during childhood. [5]
Congenital melanocytic nevi may be divided into the following types: [6]: 690–1 Small-sized congenital melanocytic nevus is defined as having a diameter less than 2 cm (0.79 in). [6]: 690 Medium-sized congenital melanocytic nevus is defined as having a diameter more than 2 cm (0.79 in) but less than 20 cm (7.9 in). [6]: 690
Lichen nitidus is a chronic inflammatory disease of unknown cause [1] characterized by 1–2 mm, discrete and uniform, shiny, flat-topped, pale flesh-colored or reddish-brown papules [2] [3] that may appear as hypopigmented against dark skin.
Should the nevi appear in toddler- or school-aged children, they are more likely to remain present throughout the rest of that person's life. [4] If they arise in adolescence and adulthood, the nevi most likely occur due to sun damage. With appropriate coverage from the sun, these lesions may go away over time.
Mongolian spot is a congenital developmental condition—that is, one existing from birth—exclusively involving the skin.The blue colour is caused by melanocytes, melanin-containing cells, that are usually located in the surface of the skin (the epidermis), but are in the deeper region (the dermis) in the location of the spot. [6]
Dysplastic nevus syndrome (B-K mole syndrome, familial atypical multiple mole–melanoma syndrome, familial melanoma syndrome) Ephelis (freckle) Epithelioid blue nevus; Generalized lentiginosis; Giant pigmented nevus (bathing trunk nevus, congenital nevomelanocytic nevus, garment nevus, giant hairy nevus, nevus pigmentosus et pilosus)
Neurocutaneous melanosis is associated with the presence of either giant congenital melanocytic nevi or non-giant nevi of the skin. It is estimated that neurocutaneous melanosis is present in 2% to 45% of patients with giant congenital melanocytic nevi. Patients with non-giant congenital melanocytic nevi seem to have a much lower, but undefined ...
"Nevus" is sometimes spelled "naevus" and "sebaceous" may also be spelled "sebaceus". "Epidermal nevus syndrome" is sometimes used as a synonym, but more often as a broader term referring to Schimmelpenning syndrome in addition to nevus comedonicus syndrome, CHILD syndrome, Becker's nevus syndrome, and phakomatosis pigmentokeratotica. [3]