VITILIGO

• Hypopigmented and depigmented lesions favor sun-exposed regions, intertriginous areas, genitalia, and sites over bony prominences (type A vitiligo).
• Areas around body orifices are also frequently involved.
• The lesions tend to be symmetric.
• Occasionally the lesions are linear or pseudodermatomal (type B vitiligo).
• Vitiligo lesions may occur at trauma sites (Koebner's phenomenon).
• The hair in affected areas may be white.
• The margins of the lesions are usually well demarcated, and when a ring of hyperpigmentation is seen, the term trichrome vitiligo is used.
• The term marginal inflammatory vitiligo is used to describe lesions with raised borders.
• Initially the disease is limited, but the lesions tend to become more extensive over the years.
• Type B vitiligo is more common in children. • Vitiligo may begin around pigmented nevi, producing a halo (Sutton's nevus); in such cases the central nevus often regresses and disappears over time

good article

as per MCQ-solving purpose,perhaps it will be MORE helpful if a brief(only with important points) comparative study between VITILIGO,ALBINISM & PIEBALDISM is given alongwith(as these are the most commonly given d.d. causing confusion for the provided case)