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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]
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.
A melanocytic nevus (also known as nevocytic nevus, nevus-cell nevus, and commonly as a mole) [1] [2] is usually a noncancerous condition of pigment-producing skin cells. It is a type of melanocytic tumor that contains nevus cells . [ 2 ]
This skin lesion is quite common in the population, and it can present at birth, known as a congenital meloncytic nevus, or later in life as an acquired nevus. 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]
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
Melanocytic nevi and neoplasms are caused by either a proliferation of (1) melanocytes, or (2) nevus cells, a form of melanocyte that lack dendritic processes. [78] [79] Acral nevus (melanocytic nevus of acral skin, melanocytic nevus with intraepidermal ascent of cells) Amelanotic blue nevus (hypomelanotic blue nevus) Becker's nevus; Balloon ...
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]
An infantile hemangioma (IH), sometimes called a strawberry mark due to appearance, is a type of benign vascular tumor or anomaly that affects babies. [1] [2] Other names include capillary hemangioma, [6] "strawberry hemangioma", [7]: 593 strawberry birthmark [8] and strawberry nevus.