omg thats the most similar vitiligo to mine I ever seen except im not so dark skined,, I have it only in my palms and feet, I noticed it since I was 5 and my parents since I was 8 and discovered what it was. it hasnt spread much the only time it spread was at age 11 a bit grew down my palms and simultaneously up my feet a little but not much in fact over the last couple years some of it actually dissapeared from my palm.