Targeted broadband ultraviolet B phototherapy improves disorders characterized by increased dermal matrix.

The article presents a case study of patients with granuloma annulare (GA), dermatofibroma (DF) and keloid/hypertropic scars (SC) treated with targeted broadband ultraviolet B phototherapy in the U.S. Researchers found that the method is beneficial because it promotes degradation of structural components of the dermis through induction of matrix metalloproteinases. Moreover, the method minimizes unnecessary risks like burns and skin cancer.