Serial clinical photographs of facial hyperpigmentation before and after stem cell-based facial treatment.

(Before) Baseline photograph obtained on 16 December before treatment, showing multiple areas of facial hyperpigmentation and melasma-like pigmentation over the cheek region.

(After) Follow-up photograph obtained approximately 7 weeks after treatment on 7 February (following year), showing visibly reduced pigmentation intensity and a more even facial skin tone compared with baseline.