A Global Study of the PETAL Consortium

Inclusion Criteria: * Untreated, relapsed, or refractory histologically confirmed mature T-cell or NK-cell neoplasm. * All subtypes of PTCL are eligible except for T-cell large granular lymphocytic leukemia, cutaneous T-cell lymphoma such as but not limited to mycosis fungoides and transformation, Sézary syndrome, and primary cutaneous CD30+ disorders. Exclusion Criteria: * Precursor T/NK neoplasms, T-cell large granular lymphocytic leukemia, cutaneous T-cell lymphoma such as but not limited to mycosis fungoides and transformation, Sézary syndrome, and primary cutaneous CD30+ disorders. * Adults who are unable to consent, individuals who are not yet adults such as infants, children and teenagers, pregnant womenPregnancy, and prisoners.