Musannaf Ibn Abi Shayba 9:404

Ghundar narrated to us, from Ash'ath, from al-Hakam, that he said regarding a man who marries a woman while he has vitiligo: He said that he did not consider it anything [of concern] regarding the man. As for leprosy, if she wishes, she may remain with him, and if she wishes, she may separate from him.