Re: vitiligo
Please consult a dermatologist. There is some remedy for such a problem. Basically, you can be provided with medication that can increase or decrease the melanin which dictates skin color.
By increasing the melanin, your brother can be made darker (more likely his own skin tone) or like Michael Jackson who is suspected of having the same affliction, you can eliminate the production of melanin, creating that pale white tone.
You do not need surgery if you brother has developed this recently as it can be rectified swiftly.
Please seek medical advice as there are several options available for vitiligo.