Seattle Genetics, Inc. announced that its collaborator, Takeda Pharmaceutical Company Limited, announced that the European Commission has extended the current conditional marketing authorization for ADCETRIS to include the treatment of adult patients with CD30-positive cutaneous T-cell lymphoma (CTCL) after at least one prior systemic therapy. ADCETRIS is an antibody-drug conjugate (ADC) directed to CD30, which is expressed on the surface of Hodgkin lymphoma cells and several types of non-Hodgkin lymphoma, including CTCL. The decision follows a positive opinion from the Committee for Medicinal Products for Human Use. The marketing authorization for ADCETRIS is valid in 28 countries of the European Union (EU), Norway, Liechtenstein and Iceland. It is based on positive results from a phase 3 trial called ALCANZA that were presented at the 58th American Society of Hematology (ASH) annual meeting in December 2016, published online in the Lancet in June 2017, and recently updated in a poster presentation at the 59th ASH annual meeting in December 2017. The trial achieved its primary endpoint with the ADCETRIS treatment arm demonstrating a highly statistically significant improvement in the rate of objective response lasting at least four months (ORR4) versus the control arm as assessed by an independent review facility. The ORR4 was 56.3% in the ADCETRIS arm compared to 12.5% in the control arm (p-value <0.001). The key secondary endpoints specified in the protocol, including complete response rate, progression-free survival and reduction in skin symptom burden as measured by the Skindex-29 questionnaire, were all highly statistically significant in favor of the ADCETRIS arm. The safety profile associated with ADCETRIS from the ALCANZA trial was generally consistent with the existing prescribing information. The most common adverse events of any grade include: anemia, peripheral sensory neuropathy, nausea, diarrhea, fatigue and neutropenia. In November 2017, the U.S. Food and Drug Administration (FDA) approved ADCETRIS for the treatment of adult patients with primary cutaneous anaplastic large cell lymphoma (pcALCL) or CD30-expressing mycosis fungoides (MF) who have received prior systemic therapy based on the results of the phase 3 ALCANZA clinical trial. Together, pcALCL and CD30-expressing MF comprise approximately 70% of CTCL diagnoses and the majority of patients who require systemic therapy. ADCETRIS is currently not approved as a frontline therapy for Hodgkin lymphoma.