During a physical assessment, patchy areas with pigmentation loss on the skin, hands, and arms are observed. With which probable cause would the nurse associate this finding?

During a physical assessment, patchy areas with pigmentation loss on the skin, hands, and arms are observed. With which probable cause would the nurse associate this finding?

• A. Autoimmune disease
• B. Fungal infection
• C. Chronic sun exposure
• D. Nutritional deficiency

Answer: (A)

Depigmented patches on exposed areas like the hands and forearms point to loss of pigment-producing cells due to an autoimmune process. This pattern is classic for vitiligo, where the immune system attacks melanocytes, leading to well-defined, completely lighter (often white) patches because melanin production stops in those areas. It’s not typically caused by a fungal infection, which usually presents with scaly patches and variable color rather than pure, sharp depigmentation. Nor is it simple sun exposure, which tends to cause tanning or sunburn rather than discrete, pigment-free patches. Nutritional deficiencies can affect skin color in other ways but don’t usually cause isolated patches of total pigment loss.

Depigmented patches on exposed areas like the hands and forearms point to loss of pigment-producing cells due to an autoimmune process. This pattern is classic for vitiligo, where the immune system attacks melanocytes, leading to well-defined, completely lighter (often white) patches because melanin production stops in those areas. It’s not typically caused by a fungal infection, which usually presents with scaly patches and variable color rather than pure, sharp depigmentation. Nor is it simple sun exposure, which tends to cause tanning or sunburn rather than discrete, pigment-free patches. Nutritional deficiencies can affect skin color in other ways but don’t usually cause isolated patches of total pigment loss.