BNZ-1, an IL-2, IL-9, and IL-15 inhibitor, may provide a novel treatment option for CTCL patients who relapsed or were refractory with conventional therapies with a favorable toxicity profile. The multifaceted approach of BNZ-1 leads to direct inhibition of malignant cells, activation of tumor immunity, and suppression of inflammation. Since BNZ-1 showed safety and efficacy in challenging rCTCL patient population, its further development in a phase 3 trial is planned.