Analysis of tumor response and clinical factors associated with vitiligo in patients receiving anti–programmed cell death-1 therapies for melanoma: A cross-sectional study

Abstract

Background Clinical factors associated with vitiligo in patients receiving anti–programmed cell death-1 (PD-1) remain unknown. Objective To better characterize the occurrence of vitiligo in patients receiving anti–PD-1. Methods The present single-center ambispective cohort study included patients with melanoma treated with anti–PD-1. Progression-free survival, overall survival, and objective tumor response were compared between patients with and those without vitiligo using Kaplan-Meier curves and the log-rank test. Demographic and clinical factors associated with vitiligo were evaluated using multivariate logistic regression. Results Of the 457 patients included in the study, vitiligo developed in 85 patients. The clinical presentation of vitiligo consisted of the presence of ovalar and multiple flecked white macules, mainly located on chronic sun-exposed areas. The presence of vitiligo was associated with a significant improvement in overall survival and progression-free survival ( P < .001). A Cox proportional hazards model estimation demonstrated markedly improved survival in patients with vitiligo compared with those without vitiligo (aHR [overall survival], 0.20; 95% CI, 0.12-0.33; P < .001; and aHR [progression-free survival], 0.33; 95% CI, 0.23-0.47; P < .001). In the multivariate logistic regression analyses, men showed an independent increased risk of the development of vitiligo (odds ratio, 1.66). In contrast, the presence of pulmonary metastases was found to be an independent factor associated with a reduced risk of the development of vitiligo (odds ratio, 0.50). Limitations Single-center ambispective cohort. Conclusion Vitiligo in patients receiving anti–PD-1 for advanced melanoma is associated with a better outcome. A gender effect associated with the development of vitiligo will need further investigation.