Targeted therapies induced depigmentation: a review.

Skin depigmentation or vitiligo-like depigmentation (VLD) is one of the most prevalent cutaneous adverse events during targeted therapies for cancers or autoimmune diseases. The depigmentation is usually with high mental burden and affect the disease treatment, some of which are even clinical markers for good prognosis. This study aimed to explore the underlying immunopathologic mechanisms of VLD induced by targeted therapy for cancer and autoimmune disease as well as vaccine, such as immune checkpoint inhibitors (e.g., programmed death 1/programmed death-ligand 1 and cytotoxic T-lymphocyte antigen-4 inhibitors), v-raf murine sarcoma viral oncogene homolog inhibitors, tyrosine kinase inhibitors, and other targeted agents. Additionally, it examined the clinical presentations, prognostic implications, and management strategies for VLD across oncologic and nononcologic contexts, including cases associated with vaccines and biologics. The development of VLD often correlates with improved therapeutic outcomes, but it presents unique challenges in balancing antitumor efficacy with patients' quality of life. This review integrated insights from oncology, dermatology, and immunology, and underscored the need for multidisciplinary approaches to enhance the understanding, prevention, and management of these complex cutaneous adverse events.