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A Mongolian spot, also known as slate grey nevus or congenital dermal melanocytosis, is a benign, flat, congenital birthmark with wavy borders and an irregular shape. In 1883, it was described and named after Mongolians by Erwin Bälz, a German anthropologist based in Japan, who erroneously believed it to be most prevalent among his Mongolian patients.
Giant congenital melanocytic nevus in newborn. 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
Transient neonatal pustular melanosis (TNPM), also known as pustular melanosis, is a type of neonatal pustular eruption that is a transient rash common in newborns.It is vesiculopustular rash made up of 1–3 mm fluid-filled lesions that rupture, leaving behind a collarette of scale and a brown macule. [3]
Recently, experimental treatment with MEK162, a MEK inhibitor, has been tried in a patient with NCM and progressive symptomatic leptomeningeal melanocytosis. Pathological studies with immunohistochemical and Western Blot analyses using Ki67 and pERK antibodies showed a potential effect of MEK inhibiting therapy.
A Mongolian blue spot (dermal melanocytosis) is a benign flat congenital birthmark with wavy borders and irregular shape, most common among East Asians and Turkic people (excluding Turks of Asia Minor), and named after Mongolians. It is also extremely prevalent among East Africans and Native Americans.
Nevus of Ota (congenital melanosis bulbi, melanosis bulborum and aberrant dermal melanocytosis, nevus fuscoceruleus ophthalmomaxillaris, oculodermal melanocytosis, oculomucodermal melanocytosis) Nevus spilus (speckled lentiginous nevus, zosteriform lentiginous nevus) Partial unilateral lentiginosis (segmental lentiginosis) Peutz–Jeghers syndrome
Nevus (pl.: nevi) is a nonspecific medical term for a visible, circumscribed, chronic lesion of the skin or mucosa. [1] The term originates from nævus, which is Latin for "birthmark"; however, a nevus can be either congenital (present at birth) or acquired.
Oculomucodermal melanocytosis; Old age spot; P. Partial unilateral lentiginosis; Perinevoid vitiligo; Peutz–Jeghers syndrome; Pigmented hairy epidermal nevus;