What skin condition may be referred to as "moth patches" due to its irregular patterns?

The correct answer is vitiligo, which is commonly associated with the term "moth patches" due to the appearance of its irregularly shaped, depigmented areas on the skin. Vitiligo occurs when melanocytes, the cells responsible for producing skin pigment, are destroyed or cease functioning. This leads to uneven skin tone resembling patches, which is reminiscent of the spotted patterns seen on a moth's wings. While chloasma, which is often related to hormonal changes and presents as brown patches, and albinism, characterized by a lack of melanin leading to a light skin tone across the entire body, are skin conditions, they do not have the irregular patchy appearance that vitiligo is known for. Leukoderma refers more broadly to skin that has lost pigment and can be a symptom of various conditions, but it lacks the specificity associated with the characteristic presentation of vitiligo.