Blaschko's lines

The lines of Blaschko describe the propagation of cells during embryogenesis, which determine the arrangement of skin lesions in the form of a peculiar pattern. Genetic variances or mutations, these cells may have a different color and thus visually distinguished from surrounding cells. This gives rise to peculiar pattern ( genetic mosaicism ) on the skin after the first describer of the Berlin dermatologist Alfred Blaschko ( 1858-1922 ), as described Blaschko lines. The Blaschko lines are on the back V-shaped, on the chest, the abdomen and the sides of S-shaped and wavy in the head area.

Blaschko recognized at the same time that this change not as the beginning of the 20th century, believed related to the Neuronalentwicklung.