What type of skin disorder involves hypopigmentation typically due to burns or congenital disease?

Leukoderma is characterized by localized areas of hypopigmentation, which can result from various factors, including burns or congenital conditions. This condition occurs when there is a reduction in melanin production in the skin, leading to lighter patches compared to the surrounding areas. It can be an indication of skin damage or a genetic predisposition that affects melanin production, which aligns with the context provided in the question regarding burns or congenital disease.

The other conditions mentioned, such as malignant melanoma, basal cell carcinoma, and squamous cell carcinoma, are types of skin cancers, which typically involve abnormal growth of skin cells rather than a loss of pigmentation. These cancers do not primarily present as hypopigmented areas resulting from burns or genetic disorders, making leukoderma the most appropriate answer in this context.