The purpose of this registry study is to create a database-a collection of information-for better understanding T-cell lymphoma. Researchers will use the information from this database to learn more about how to improve outcomes for people with T-cell lymphoma.

Inclusion Criteria:

• Written informed consent

• Adequate fresh or archival tumor biopsy or intent to obtain fresh tumor biopsy.

• Pathologically-confirmed mature T- or natural killer (NK)-cell lymphoma meeting one of the following diagnostic criterion (based on WHO classification and NCCN guidelines):

  • T-cell prolymphocytic leukemia
  • T-cell large granular lymphocytic leukemia
  • Chronic lymphoproliferative disorder of NK cells
  • Aggressive NK-cell leukemia
  • Systemic Epstein-Barr virus (EBV)-positive T-cell lymphoma of childhood
  • Chronic active EBV infection of T- and NK-cell type, systemic form
  • Hydroa vacciniforme-like lymphoproliferative disorder
  • Adult T-cell leukemia/lymphoma
  • Extranodal NK/T-cell lymphoma, nasal type
  • Enteropathy-associated T-cell lymphoma
  • Monomorphic epitheliotropic intestinal T-cell lymphoma
  • Intestinal T-cell lymphoma, not otherwise specified (NOS)
  • Indolent T-cell lymphoproliferative disorder of the gastrointestinal tract
  • Hepatosplenic T-cell lymphoma
  • Subcutaneous panniculitis-like T-cell lymphoma
  • Mycosis fungoides (limited to those with ≥ stage IB disease and those receiving active therapy)
  • Sézary syndrome
  • Primary cutaneous anaplastic large cell lymphoma (receiving systemic therapy)
  • Primary cutaneous Gamma-Delta T-cell lymphoma
  • Primary cutaneous CD8+ aggressive epidermotropic cytotoxic T-cell lymphoma
  • Primary cutaneous acral CD8+ T-cell lymphoma (receiving systemic therapy)
  • Peripheral T-cell lymphoma, not otherwise specified
  • Angioimmunoblastic T-cell lymphoma
  • Follicular T-cell lymphoma
  • Nodal peripheral T-cell lymphoma with TFH phenotype
  • Anaplastic large cell lymphoma, ALK-positive
  • Anaplastic large cell lymphoma, ALK-negative
  • Breast-implant associated anaplastic large cell lymphoma.

• NOTE: Patients with diagnoses of mycosis fungoides, primary cutaneous anaplastic large cell lymphoma, and/or primary cutaneous acral CD8+ T-cell lymphoma must be receiving systemic therapy.

Exclusion Criteria:

• Patients with of mycosis fungoides, primary cutaneous anaplastic large cell lymphoma, and/or primary cutaneous acral CD8+ T-cell lymphoma not receiving systemic therapy.
• Inability to collect prospective data, measure response, or perform adequate follow-up assessments in the clinical judgment of the treating physician. NOTE: Repository participation does not exclude participation in clinical trials, nor does existing clinical trial participation exclude enrollment in the study herein outlined.

Participants at Memorial Sloan Kettering Cancer Center (MSKCC) will be recruited through the Lymphoma service in the Department of Medicine and the Department of Pediatrics. Participants will be recruited at the participating centers.

Memorial Sloan Kettering Cancer Center supports the international committee of medical journal editors (ICMJE) and the ethical obligation of responsible sharing of data from clinical trials. The protocol summary, a statistical summary, and informed consent form will be made available on clinicaltrials.gov when required as a condition of Federal awards, other agreements supporting the research and/or as otherwise required. Requests for deidentified individual participant data can be made beginning 12 months after publication and for up to 36 months post publication. Deidentified individual participant data reported in the manuscript will be shared under the terms of a Data Use Agreement and may only be used for approved proposals. Requests may be made to: crdatashare@mskcc.org.