A Study to Assess the Clinical Efficacy and Safety of Daratumumab in Participants With Relapsed or Refractory Natural Killer/T-Cell Lymphoma (NKTCL), Nasal Type

An Open Label, Phase 2 Study to Assess the Clinical Efficacy and Safety of Daratumumab in Patients With Relapsed or Refractory Natural Killer/T-Cell Lymphoma, Nasal Type

The purpose of this study is to assess the clinical efficacy and safety of daratumumab in relapsed or refractory natural killer/T-cell lymphomas (NKTCL).

Inclusion Criteria:

• Documented as histologically confirmed extranodal natural killer/T-cell lymphomas (NK/T)-cell lymphoma, nasal type according to the World Health Organization (WHO) classification and the pathology report will be verified by the Sponsor
• Failed at least 1 line of chemotherapy and who, according to treating physician or investigator, is not candidate to receive other treatment modalities
• At least 1 measurable site of disease
• Eastern Cooperative Oncology Group (ECOG) performance status score of 0, 1 or 2 and life expectancy greater than or equal to (>=) 3 months

Exclusion Criteria:

• Received daratumumab or other antiCD38 therapies previously
• Previous allogenic stem cell transplant or autologous stem cell transplantation within 12 weeks before the first administration of the study drug
• Clinical symptoms of central nervous system involvement
• Known chronic obstructive pulmonary disease, known moderate or severe persistent asthma within the past 2 years, or uncontrolled asthma of any classification
• Clinically significant cardiac disease, including:Myocardial infarction within 6 months before the first study agent administration, or unstable or uncontrolled disease/condition related to or affecting cardiac function (eg, unstable angina, congestive heart failure, New York Heart Association Class III-IV); Uncontrolled cardiac arrhythmia (Common Terminology Criteria for Adverse Events [CTCAE] [most recent version] Grade 3 or higher) or clinically significant ECG abnormalities; Screening 12-lead ECG showing a baseline QT interval as corrected QTc >470 msec
• Seropositive for human immunodeficiency virus
• Seropositive for hepatitis B or hepatitis C
• Abnormal laboratory values according to protocol defined parameters at screening