What skin condition is characterized by patches of skin that lack pigmentation?

• A. Vitiligo
• B. Melasma
• C. Lentigo
• D. Chloasma

Answer: (A)

The skin condition characterized by patches of skin that lack pigmentation is vitiligo. This condition occurs when melanocytes, the cells responsible for producing melanin (the pigment that gives skin its color), are destroyed or stop functioning. This results in lighter patches of skin that can vary in size and location. Vitiligo can affect people of any ethnicity, but it often becomes more apparent in individuals with darker skin tones.

Melasma is a condition that typically presents as brown or gray-brown patches of skin, primarily on the face, and is often associated with hormonal changes, especially during pregnancy. Lentigo refers to small, flat, brown spots on the skin that are usually associated with sun exposure and are not depigmented. Chloasma, also known as the "mask of pregnancy," presents similarly to melasma, with dark patches on the face due to hormonal influences.

Vitiligo is distinct in its depigmented patches, making it essential to recognize for accurate diagnosis and treatment.