Blaschko’s lines represent?
A. Lines of development
C. Lines along blood vessels
D. Lines along lymphatics
Correct answer : A. Lines of development
Blaschko’s lines are invisible developmental lines of the skin
They are thought to represent the pathways of epithelial migration and proliferation in the foetus
These were first demonstrated by German dermatologist Alfred Blaschko in 1901.
They do not correspond to the path of vessels / nerves / lymphatics
Many skin lesions follow Blaschko’s lines. eg: Incontinentia pigmenti, Linear lichen planus, Lichen striatus Naevus achromicus