Old is gold—Revisiting the efficacy of topical psoralen–ultraviolet A phototherapy for palmoplantar dermatoses

Palmoplantar involvement of dermatoses such as atopic dermatitis and psoriasis has significant impact on quality of life. While systemic treatment options have increased in recent years, topical psoralen ultraviolet A (tPUVA) therapy remains a viable option when topical treatments have failed and potential systemic adverse events outweigh benefits. Literature on tPUVA efficacy is sparse. Our objectives were to report the efficacy of tPUVA after an initial treatment course and to identify associated clinical factors.