In a phase II study performed in Japan, 37 patients with relapsed/refractory CCR4+ peripheral T-cell lymphoma (n = 29) and MF (n = 7) received mogamulizumab at a dose of 1 mg/ kg IV once per week for 8 weeks with ORR as the primary endpoint. The gene discussed is CCR4; the disease is peripheral T-cell lymphoma, not otherwise specified.