Vitiligo 白斑（白なまず）

1:25 I have a skin disorder that destroys the pigmentation of the skin. it's something that I cannot help.

Michael Jackson Said It Would Be "Horrifying" If a White Actor Played Him | Where Are They Now | OWN

https://www.youtube.com/watch?v=Z6lbgW_-rSA  0:39 it's called vitiligo. 色素が抜けて肌が白くなるのを白なまずといいます。
Winnie Harlow - The model who's bringing vitiligo into the open - BBC Trending

参考リンク

http://bridge-english.blogspot.jp/2016/12/osteogenesis-imperfecta.html  Osteogenesis Imperfecta 骨形成不全症