Mogamulizumab (anti-CCR4) has been recently approved and reimbursed in Italy for the treatment of Cutaneous T-cell lymphoma (CTCL) after 1 previous systemic treatment based on the favourable results of the MAVORIC clinical trial. To date, no real-world data on significant series of patients treated routinely with mogamulizumab in clinical practice are available. As real-life data are essential to confirm the preliminary evidence displayed in phase III trials, this study aims at describing the clinical activity and safety profile of mogamulizumab at standard dose in the treatment of CTCL patients in real world settings.