Mongolian spot

Classification according to ICD-10
D22.5	Melanocyte nevus of the trunk
ICD-10 online (WHO version 2019)

Image of a Mongolian spot

The Mongolian spot (also congenital dermal melanocytosis , Asian spot , sacral spot , rump spot , Hun's spot ) denotes one or more irregular bluish moles, usually on the back, buttocks or sacrum of a child.

clinic

The so-called Mongolian spot is a harmless collection of pigment cells ( melanocytes ) . This remnant of the embryonic development arises from the fact that the melanocyte precursors ( melanoblasts ) migrate into the skin from a tissue layer of the neural tube (from which the spinal cord later develops).

The Mongolian stain fades in childhood and usually disappears during puberty at the latest .

Persistent, very extensive, or generalized forms are rare. In principle, parts of the body other than the back and buttocks can also be affected (e.g. face or extremities)

history

The trait was discovered and so named by the German anthropologist Erwin Bälz at the end of the 19th century. The name Mongolian spot is derived from the outdated racial theories , according to which people of East Asian origin as well as the American natives were called " Mongolids ". It was seen by French researchers in the 20th century as an indication of the spread of the Huns . However, the Mongolian spot also occurs in America. According to the French anthropologist Robert Gessain, however, the stain should originally have occurred among the Eskimos.

Epidemiology

99% of the children of Chinese, Japanese, Koreans, Vietnamese, Mongols, Turkic peoples, Indochinese, Indians and Eskimos have a Mongol mark at birth. However, the mark is almost as common in people from the Middle East. The frequency ranges from 95 to 100% in Asia and from 90 to 95% in East Africa. It is also less common among Europeans from the Eastern Mediterranean.

The incidence of the Mongolian spot is highly dependent on the general pigmentation of the skin . It is sometimes mistakenly viewed as a skin condition.

Web links

Mongolian Spot (Child Fleck )

Individual evidence

↑ Johannes Petres, Rainer Rompel: Operative Dermatology: Textbook and Atlas . 2nd Edition. Springer-Verlag, Heidelberg 2007, ISBN 978-3-540-34086-7 , p. 275 .
↑ Peter Fritsch, Thomas Schwarz: Dermatology Venerology: Basics. Clinic. Atlas . 3rd completely revised edition. Springer, Berlin, Heidelberg 2018, ISBN 978-3-662-53647-6 , pp. 880 .
↑ Baelz, E. The physical characteristics of the Japanese. (1885) Mittheil.d German Gesell. f. Natural history and ethnology of East Asia. Vol. 4, H. 32
↑ Gessain, Robert (1953). "La tache pigmentaire congénitale chez les Eskimo d'Angmassalik". Journal de la Société des Américanistes 42: 301-332.
↑ http://www.tokyo-med.ac.jp/genet/msp/about.htm
↑ Johannes Petres, Rainer Rompel: Operative Dermatology: Textbook and Atlas. 2nd edition, Springer-Verlag, Heidelberg 2007, ISBN 978-3-540-34086-7 , p. 275.

[1] Johannes Petres, Rainer Rompel: Operative Dermatology: Textbook and Atlas . 2nd Edition. Springer-Verlag, Heidelberg 2007, ISBN 978-3-540-34086-7 , p. 275 .

[2] Peter Fritsch, Thomas Schwarz: Dermatology Venerology: Basics. Clinic. Atlas . 3rd completely revised edition. Springer, Berlin, Heidelberg 2018, ISBN 978-3-662-53647-6 , pp. 880 .

[3] Baelz, E. The physical characteristics of the Japanese. (1885) Mittheil.d German Gesell. f. Natural history and ethnology of East Asia. Vol. 4, H. 32

[4] Gessain, Robert (1953). "La tache pigmentaire congénitale chez les Eskimo d'Angmassalik". Journal de la Société des Américanistes 42: 301-332.

[5] ttp://www.tokyo-med.ac.jp/genet/msp/about.htm

[Petres_u._Rompel-6] Johannes Petres, Rainer Rompel: Operative Dermatology: Textbook and Atlas. 2nd edition, Springer-Verlag, Heidelberg 2007, ISBN 978-3-540-34086-7 , p. 275.