This cluster of papers focuses on the classification, staging, treatment, and prognosis of cutaneous lymphomas, with a specific emphasis on mycosis fungoides and Sézary syndrome. It includes discussions on the WHO-EORTC classification, survival outcomes, prognostic factors, and various treatment options such as bexarotene and denileukin diftitox. The cluster also addresses the incidence patterns, genomic landscape, and molecular profiling of cutaneous T-cell lymphomas.