Hypopigmented patches in an 8-year-old boy

An 8-year-old boy presents with asymptomatic hypopigmented patches on his bilateral cheeks which
have been worsening for two weeks. The patches are oval in shape and have spared other parts of the
body. There is no preceding erythematous rash. Similar lesions appeared two years ago which took
several months to resolve. There are no recent triggers, such as personal care products. He has no history
of atopy, but his mother has a recent history of atopic eczema. There is no known history of thyroid
problems in the family. He was prescribed a topical cream from a general practitioner, but the patches
persisted, and new patches appeared. He is otherwise well and actively participating in outdoor physical
activities with frequent sun exposure. (Copied from article).