Vitiligo is a chronic skin condition that is caused by a lack of melanin. Because of the loss of pigmentation the skin appears with discolored white patches.
The correct pronunciation of vitiligo in English can be phonetically transcribed as Vih-tuh-lie-go. This is how the word is pronounced in both Britain and the United States, but it does not correspond to the pronunciation of the word in Latin, where it derives from. In Latin, the correct pronunciation would be akin to Vee-tee-lee-go.