This post-marketing surveillance (PMS) is designed as an all-case investigation in accordance with the Korean Ministry of Food and Drug Safety (MFDS) re-examination requirements. It targets adult patients with mycosis fungoides (MF) or Sézary syndrome (SS) who have received at least one prior systemic therapy and are treated with mogamulizumab (POTELIGEO® Injection 20 mg) under the approved indication in Korea.
Primary Objective: To assess the safety of mogamulizumab for patients treated under the approved indication in Korea.
Secondary Objective: To assess the effectiveness of mogamulizumab for patients treated under the approved indication in Korea.
Exploratory Objective: To perform additional subgroup and exploratory analyses of effectiveness, including evaluation in special populations such as elderly patients, patients with renal or hepatic impairment, and those with a history of hematopoietic stem cell transplantation, treated under the approved indication in Korea
