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The non-Hodgkin lymphoma (NHL) T-cell lymphomas are a heterogeneous group of T-cell lymphoproliferative malignancies, which account for less than 15% of NHLs.[
T-cell lymphoma can be divided into cutaneous T-cell lymphoma (CTCL), peripheral T-cell lymphoma (PTCL), and T-cell lymphoblastic lymphoma/acute lymphocytic leukemia (T-LBL/ALL).
T-LBL/ALL arises from very early T cells, often involves the thymus, and is more common in young adults. The lymphoma form is often treated similarly to the leukemia form. For more information, see Acute Lymphoblastic Leukemia Treatment.
CTCL starts in the skin and includes mycosis fungoides, Sézary syndrome, primary cutaneous anaplastic large cell lymphoma, and others. For more information, see Mycosis Fungoides and Other Cutaneous T-Cell Lymphomas Treatment.
PTCL originates from mature T cells. It usually arises from lymphoid tissues but can spread to other organs. Subsets of PTCL include anaplastic large cell lymphoma (ALCL), angioimmunoblastic T-cell lymphoma (AITL), extranodal natural killer/T-cell lymphoma (ENK/TCL), PTCL not otherwise specified (PTCL-NOS), enteropathy-associated T-cell lymphoma (EATL), hepatosplenic T-cell lymphoma (HSTCL), adult T-cell leukemia/lymphoma (ATL), T-cell prolymphocytic leukemia (T-PLL), and others.
Incidence and Mortality
T-cell lymphomas make up less than 15% of NHL cases. Most T-cell lymphoma subtypes are associated with worse outcomes than those of B-cell lymphomas.[
Anatomy
NHL usually originates in lymphoid tissues.
The lymph system is part of the body's immune system and is made up of tissues and organs that help protect the body from infection and disease. These include the tonsils, adenoids (not shown), thymus, spleen, bone marrow, lymph vessels, and lymph nodes. Lymph tissue is also found in many other parts of the body, including the small intestine.
Prognosis and Survival
Prognosis in PTCL varies depending on subtype, stage, and other factors. In general, PTCL is associated with a poor prognosis, with a 5-year survival rate of approximately 30% to 40%.[
Unlike B-cell NHLs, which include both indolent and aggressive forms, most PTCLs are considered aggressive.[
Even though existing treatments cure a significant fraction of patients with lymphoma, numerous clinical trials that explore treatment improvements are in progress. If possible, patients can be included in these studies.
In addition to screening for HIV among patients with aggressive lymphomas, active hepatitis B or hepatitis C can be assessed before treatment with chemotherapy.[
References:
Late effects of treatment of non-Hodgkin lymphoma (NHL) have been observed. Impaired fertility may occur after exposure to alkylating agents.[
Left ventricular dysfunction was a significant late effect in long-term survivors of high-grade NHL who received more than 200 mg/m² of doxorubicin.[
Myelodysplastic syndrome and acute myelogenous leukemia are late complications of myeloablative therapy with autologous bone marrow or peripheral blood stem cell support, as well as conventional chemotherapy-containing alkylating agents.[
A study of young women who received autologous BMT reported successful pregnancies with children born free of congenital abnormalities.[
Some patients have osteopenia or osteoporosis at the start of therapy; bone density may worsen after therapy for lymphoma.[
References:
A pathologist should be consulted before a biopsy because some studies require special preparation of tissue (e.g., frozen tissue). Knowledge of cell surface markers and immunoglobulin and T-cell receptor gene rearrangements may help with diagnostic and therapeutic decisions. The clonal excess of light-chain immunoglobulin may differentiate malignant cells from reactive cells. Because the prognosis and the approach to treatment are influenced by histopathology, outside biopsy specimens should be carefully reviewed by a hematopathologist who is experienced in diagnosing lymphomas. Although lymph node biopsies are recommended whenever possible, sometimes immunophenotypic data are sufficient for diagnosis of lymphoma when fine-needle aspiration cytology or core needle biopsy is preferred.[
Current Classification Systems
Updated REAL/WHO classification
The World Health Organization (WHO) modification of the Revised European American Lymphoma (REAL) classification recognizes three major categories of lymphoid malignancies based on morphology and cell lineage: B-cell neoplasms, T-cell/natural killer (NK)-cell neoplasms, and Hodgkin lymphoma (HL). Both lymphomas and lymphoid leukemias are included in this classification because both solid and circulating phases are present in many lymphoid neoplasms and distinction between them is artificial. For example, B-cell chronic lymphocytic leukemia (CLL) and B-cell small lymphocytic lymphoma are simply different manifestations of the same neoplasm, as are lymphoblastic lymphomas and acute lymphocytic leukemias. Within the B-cell and T-cell categories, two subdivisions are recognized: precursor neoplasms, which correspond to the earliest stages of differentiation, and more mature differentiated neoplasms.[
B-cell neoplasms
T-cell and putative NK-cell neoplasms
HL
The REAL classification encompasses all the lymphoproliferative neoplasms. For more information, see the following PDQ summaries:
Subtypes of Peripheral T-Cell Non-Hodgkin Lymphoma
Peripheral T-cell non-Hodgkin lymphoma includes the following subtypes, among others:
References:
Stage is important in selecting a treatment for patients with non-Hodgkin lymphoma (NHL). Chest and abdominal computed tomography (CT) scans are usually part of the staging evaluation for all patients with lymphoma. The staging system for NHL is similar to the staging system used for Hodgkin lymphoma (HL).
It is common for patients with NHL to have involvement of the following sites:
Cytological examination of cerebrospinal fluid may be positive in patients with aggressive NHL. Involvement of hilar and mediastinal lymph nodes is less common than in HL. Mediastinal adenopathy, however, is a prominent feature of lymphoblastic lymphoma and primary mediastinal B-cell lymphoma, entities primarily found in young adults.
Most patients with NHL present with advanced (stage III or stage IV) disease often identified by CT scans or biopsies of the bone marrow and other accessible sites of involvement. In a retrospective review of over 32,000 cases of lymphoma in France, up to 40% of diagnoses were made by core needle biopsy, and 60% were made by excisional biopsy.[
Positron emission tomography (PET) with fluorine F 18-fludeoxyglucose can be used for initial staging. It can also be used for follow-up after therapy as a supplement to CT scanning.[
In a retrospective study of 130 patients with diffuse large B-cell lymphoma, PET scanning identified all clinically important marrow involvement from lymphoma, and bone marrow biopsy did not upstage any patient's lymphoma.[
Staging Subclassification System
Lugano classification
The American Joint Committee on Cancer (AJCC) has adopted the Lugano classification to evaluate and stage lymphoma.[
Stage | Stage Description | Illustration |
---|---|---|
CSF = cerebrospinal fluid; CT = computed tomography; DLBCL = diffuse large B-cell lymphoma; NHL = non-Hodgkin lymphoma. | ||
a Hodgkin and Non-Hodgkin Lymphomas. In: Amin MB, Edge SB, Greene FL, et al., eds.:AJCC Cancer Staging Manual. 8th ed. New York, NY: Springer, 2017, pp. 937–58. | ||
b Stage II bulky may be considered either early or advanced stage based on lymphoma histology and prognostic factors. | ||
c The definition of disease bulk varies according to lymphoma histology. In the Lugano classification, bulk ln Hodgkin lymphoma is defined as a mass greater than one-third of the thoracic diameter on CT of the chest or a mass >10 cm. For NHL, the recommended definitions of bulk vary by lymphoma histology. In follicular lymphoma, 6 cm has been suggested based on the Follicular Lymphoma International Prognostic Index-2 and its validation. In DLBCL, cutoffs ranging from 5 cm to 10 cm have been used, although 10 cm is recommended. | ||
Limited stage | ||
I | Involvement of a single lymphatic site (i.e., nodal region, Waldeyer's ring, thymus, or spleen). | |
IE | Single extralymphatic site in the absence of nodal involvement (rare in Hodgkin lymphoma). | |
II | Involvement of two or more lymph node regions on the same side of the diaphragm. | |
IIE | Contiguous extralymphatic extension from a nodal site with or without involvement of other lymph node regions on the same side of the diaphragm. | |
II bulkyb | Stage II with disease bulk.c | |
Advanced stage | ||
III | Involvement of lymph node regions on both sides of the diaphragm; nodes above the diaphragm with spleen involvement. | |
IV | Diffuse or disseminated involvement of one or more extralymphatic organs, with or without associated lymph node involvement; or noncontiguous extralymphatic organ involvement in conjunction with nodal stage II disease; or any extralymphatic organ involvement in nodal stage III disease. Stage IV includes any involvement of the CSF, bone marrow, liver, or multiple lung lesions (other than by direct extension in stage IIE disease). | |
Note: Hodgkin lymphoma uses A or B designation with stage group. A/B is no longer used in NHL. |
Occasionally, specialized staging systems are used. The physician should be aware of the system used in a specific report.
The E designation is used when extranodal lymphoid malignancies arise in tissues separate from, but near, the major lymphatic aggregates. Stage IV refers to disease that is diffusely spread throughout an extranodal site, such as the liver. If pathological proof of involvement of one or more extralymphatic sites has been documented, the symbol for the site of involvement, followed by a plus sign (+), is listed.
N = nodes | H = liver | L = lung | M = bone marrow |
S = spleen | P = pleura | O = bone | D = skin |
Current practice assigns a clinical stage based on the findings of the clinical evaluation and a pathological stage based on the findings from invasive procedures beyond the initial biopsy.
For example, on percutaneous biopsy, a patient with inguinal adenopathy and a positive lymphangiogram without systemic symptoms might have involvement of the liver and bone marrow. The precise stage of such a patient would be clinical stage IIA, pathological stage IVA(H+)(M+).
Several other factors that are not included in the above staging system are important for the staging and prognosis of patients with NHL. These factors include the following:
The National Comprehensive Cancer Network International Prognostic Index (IPI) for aggressive NHL (diffuse large cell lymphoma) identifies the following five significant risk factors prognostic of overall survival (OS) and their associated risk scores:[
Risk scores:
References:
Anaplastic large cell lymphoma (ALCL) is a peripheral T-cell lymphoma associated with the CD30 antigen. The translocation of chromosomes 2 and 5 creates a unique fusion protein with a nucleophosmin–anaplastic lymphoma kinase (ALK).[
Treatment Options for Anaplastic Large Cell Lymphoma
ALCL in children is usually characterized by systemic and cutaneous disease and has high response rates and good OS with doxorubicin-based combination chemotherapy.[
Breast Implant–Associated Anaplastic Large Cell Lymphoma
Patients with breast implant–associated ALCL may do well without chemotherapy after capsulectomy and implant removal if the disease is confined to the fibrous capsule, and no associated mass or lymphadenopathy is present.[
Primary cutaneous ALCL is a distinct entity that is typically ALK-negative and has a very indolent/low-grade clinical course. Breast implant–associated ALCL almost always occurs with implants that have a textured surface (so-called macrotextured implants) that helps adhere to the breast. Warnings, suspensions, and bans of macrotextured implants have occurred worldwide. The risk of breast implant–associated ALCL is approximately 1 in 12,000 people, but this risk may rise with further follow-up.[
Current Clinical Trials
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References:
The 2016 World Health Organization (WHO) classification recognized nodal lymphomas of T follicular helper (TFH) cell origin as a distinct subset of peripheral T-cell lymphoma (PTCL). Unified by a CD4+ TFH cell origin, this subset includes:[
AITL is the most common of these entities and is the second-most common subtype of PTCL.[
The remaining subtypes of nodal lymphomas of TFH cell origin, including F-PTCL and nodal PTCL with TFH phenotype, are derived from the same cell of origin. However, unlike AITL, these subtypes are not associated with hypervascularity on nodal biopsy and often lack the hyperinflammatory symptoms characteristic of AITL.[
Treatment Options for Nodal Lymphomas of T Follicular Helper Cell Origin (Including Angioimmunoblastic T-Cell Lymphoma, Follicular Peripheral T-Cell Lymphoma, and Nodal Peripheral T-Cell Lymphoma With T Follicular Helper Phenotype)
Doxorubicin-based combination chemotherapy, such as the CHO(E)P regimen (cyclophosphamide, doxorubicin, vincristine, etoposide, and prednisone), is commonly used for patients with AITL and other nodal lymphomas of TFH cell origin.[
The International Peripheral T-Cell Lymphoma Project involving 22 international centers identified 243 patients with AITL. The 5-year overall survival rate was 33%, and the failure-free survival rate was 18%.[
Current Clinical Trials
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References:
Patients with peripheral T-cell lymphoma, not otherwise specified (PTCL-NOS) have diffuse large cell or diffuse mixed lymphoma that expresses a cell surface phenotype of a postthymic (or peripheral) T-cell expressing either CD4 or, less often, CD8.[
Prognosis
Most investigators report worse response and survival rates for patients with PTCL-NOS than for patients with comparably staged B-cell aggressive lymphomas.[
Treatment Options for Peripheral T-Cell Lymphoma, Not Otherwise Specified
Therapy involves doxorubicin-based combination chemotherapy such as cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP) or CHO(E)P (cyclophosphamide, doxorubicin, vincristine, etoposide, and prednisone). Doses are the same as those used for DLBCL.[
For patients with early-stage disease, anecdotal retrospective series disagree on the value of consolidative radiation therapy after combination chemotherapy.[
Evidence (CHOP, CHO[E]P, or other options for relapsing disease):
Incorporation of these new agents with CHOP chemotherapy is under clinical evaluation.[
Current Clinical Trials
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References:
Extranodal natural killer (NK)/T-cell lymphoma, nasal type, is an aggressive lymphoma marked by extensive necrosis and angioinvasion, most often presenting in extranodal sites, in particular the nasal or paranasal sinus region.[
Treatment Options for Extranodal Natural Killer/T-Cell Lymphoma
The management of localized ENKL with nasal involvement involves combined modality therapy with chemotherapy and radiation therapy for those fit for chemotherapy or radiation therapy alone for those unfit for chemotherapy. The management of nonlocalized nasal ENKL and all cases of extranasal ENKL involves combination chemotherapy with or without radiation therapy.[
Evidence (asparaginase-based combination chemotherapy):
Despite no head-to-head studies, this regimen is used more often in clinical practice, in patients with advanced-stage disease, or in combination with radiation therapy for patients with localized disease. Other asparaginase-based regimens which have been studied include gemcitabine, oxaliplatin, and pegaspargase (P-GEMOX);[
Radiation therapy is an essential component of treatment for localized ENKL, nasal type, whether given as a monotherapy or as part of combined modality therapy.
Evidence (radiation therapy with or without chemotherapy):
Higher doses of radiation therapy administered at more than 50 Gy are associated with improved outcomes according to anecdotal reports.[
For patients with relapsed or refractory disease, therapies targeting programmed death 1 (PD-1) and programmed death-ligand 1 (PD-L1) have demonstrated promising results.
Evidence (immunotherapy):
Current Clinical Trials
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References:
Enteropathy-associated T-cell lymphoma (EATL) and monomorphic epitheliotropic intestinal T-cell lymphoma (MEITL) are rare subsets of peripheral T-cell lymphoma (PTCL) which together account for less than 5% of PTCL. EATL (sometimes referred to as type 1 EATL) is a complication of celiac disease and is more common in Europe. MEITL (sometimes referred to as type 2 EATL) is not associated with celiac disease and is more common in Asia. Mutations in SETD2 and, to a lesser extent, STAT5B are seen in most cases of EATL and MEITL.[
Treatment Options for Enteropathy-Associated and Monomorphic Epitheliotropic Intestinal T-Cell Lymphomas
Recommended management includes CHO(E)P (cyclophosphamide, doxorubicin, vincristine, etoposide, and prednisone), but relapse is common and outcomes are generally poor.[
Current Clinical Trials
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References:
Hepatosplenic T-cell lymphoma (HSTCL) is a rare subtype of peripheral T-cell lymphoma (PTCL) comprising approximately 1% of PTCL. HSTCL often involves young men. HSTCL appears to be localized to the hepatic and splenic sinusoids, with cell surface expression of the gamma delta T-cell receptor.[
Treatment Options for Hepatosplenic T-Cell Lymphoma
HSTCL is treated with induction chemotherapy and stem cell transplant (SCT) consolidation.[
Evidence (induction chemotherapy and SCT consolidation):
The use of ICE (ifosfamide, carboplatin, and etoposide) or IVAC (ifosfamide, etoposide, and high-dose cytarabine) has resulted in improved responses when compared with CHOP in other smaller studies as well.[
Current Clinical Trials
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Adult T-cell leukemia/lymphoma (ATL) is caused by infection with the retrovirus human T-lymphotrophic virus 1 (HTLV1) and is frequently associated with lymphadenopathy, hypercalcemia, circulating leukemic cells, bone and skin involvement, hepatosplenomegaly, a rapidly progressive course, and poor response to combination chemotherapy.[
Treatment Options for Adult T-Cell Leukemia/Lymphoma
Treatment options for ATL include:
Biological and targeted therapies
Mogamulizumab
The anti-CCR4 monoclonal antibody mogamulizumab has a targeted lysis of the ATL clone and also reduces the immunosuppressive Treg population, allowing improvement of cell-mediated immunotherapy.[
A retrospective review evaluated mogamulizumab combined with both the VCAP-AMP-VECP (vincristine, cyclophosphamide, doxorubicin, prednisone; doxorubicin, ranimustine, prednisone; vindesine, etoposide, carboplatin, prednisone) regimen and CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisone)-based regimens versus chemotherapy alone. The review concluded that the 4-year OS rate was 46.3% in the mogamulizumab combination groups, compared with 20.6% in the chemotherapy-alone group.[
Mogamulizumab is often avoided in patients planning allogeneic SCT based on data from Japan that showed an increased risk of severe graft-versus-host disease (GVHD) in patients who received mogamulizumab before allogeneic SCT.[
Brentuximab vedotin
Brentuximab vedotin is a monoclonal antibody-drug conjugate directed at CD30 and is a treatment option for patients with ATL whose tumor expresses CD30.[
Lenalidomide
In a multicenter phase II study (NCT01724177) of 26 patients with relapsed ATL, the overall response rate was 42% (95% CI, 23%–63%) in patients who received the immunomodulatory agent lenalidomide.[
Valemetostat
Valemetostat is a selective dual inhibitor of EZH1 and EZH2, which are important histone methyltransferases involved with chromatin folding.[
Zidovudine and interferon-alpha
The combination of zidovudine and interferon-alpha has activity against ATL, especially among patients with the chronic and smoldering versions of ATL.[
Cytotoxic chemotherapy and allogeneic SCT
The acute and lymphoma types of ATL respond poorly to combination cytotoxic chemotherapy and allogeneic SCT, with a median OS under 1 year.[
The cytotoxic chemotherapy backbone for patients with ATL in the United States and Europe is the CHOP or CHO(E)P regimen (cyclophosphamide, doxorubicin, vincristine, etoposide, and prednisone). Brentuximab vedotin has been added to CHOP in rare cases when patients express CD30. For the acute and lymphoma versions of ATL, a series of clinical trials in Japan established VCAP-AMP-VECP as the standard first-line treatment.[
Allogeneic SCT is frequently used for patients achieving first or later remission, although results are largely anecdotal.[
Current Clinical Trials
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References:
Prolymphocytic leukemia (PLL) is a rare form of lymphocytic leukemia characterized by excessive prolymphocytes in the blood with a typical phenotype that is positive for CD19, CD20, and surface-membrane immunoglobulin and negative for CD5.[
Treatment Options for T-Cell Prolymphocytic Leukemia
Cladribine appears to be an active agent (60% complete remission rate) for patients with de novo B-cell PLL.[
Current Clinical Trials
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References:
Treatment Options for Relapsed or Refractory Peripheral T-Cell Lymphoma
Treatment options for relapsed or refractory peripheral T-cell lymphoma include:
Current Clinical Trials
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References:
The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.
Cellular Classification of Peripheral T-Cell Non-Hodgkin Lymphoma
Revised the list of peripheral T-cell and natural killer (NK)-cell neoplasms to include nodal lymphomas of T follicular helper cell origin (including angioimmunoblastic T-cell lymphoma, follicular peripheral T-cell lymphoma [PTCL], and nodal PTCL with T follicular helper phenotype) and monomorphic epitheliotropic intestinal T-cell lymphoma.
Revised the list of peripheral T-cell non-Hodgkin lymphoma (NHL) subtypes to include nodal lymphomas of T follicular helper cell origin (including angioimmunoblastic T-cell lymphoma, follicular peripheral T-cell lymphoma, and nodal peripheral T-cell lymphoma with T follicular helper phenotype) and enteropathy-associated and monomorphic epitheliotropic intestinal T-cell lymphoma.
Treatment of Anaplastic Large Cell Lymphoma
Added text to state that ALK-negative anaplastic large cell lymphoma (ALCL) has been characterized by DUSP22 chromosomal rearrangements and TP63 mutational status. While DUSP22 rearrangements are associated with improved prognosis, TP63 mutations are associated with poorer outcomes (cited Onaindia et al. as reference 5).
Revised text to state that for patients with relapsed disease, anecdotal responses have been reported for brentuximab vedotin, belinostat, romidepsin, and pralatrexate (cited O'Connor et al. as reference 12).
Added text to state that breast implant–associated ALCL almost always occurs with implants that have a textured surface that helps adhere to the breast. Warnings, suspensions, and bans of macrotextured implants have occurred worldwide. The risk of breast implant–associated ALCL is approximately 1 in 12,000 people, but this risk may rise with further follow-up (cited Kinslow et al. as reference 26).
Treatment of Nodal Lymphomas of T Follicular Helper Cell Origin (Including Angioimmunoblastic T-Cell Lymphoma, Follicular Peripheral T-Cell Lymphoma, and Nodal Peripheral T-Cell Lymphoma With T Follicular Helper Phenotype)
This section was renamed from Treatment of Angioimmunoblastic T-Cell Lymphoma and extensively revised.
Treatment of Peripheral T-Cell Lymphoma, Not Otherwise Specified
Added text to state that gene expression profiling studies have identified two distinct subtypes of PTCL, not otherwise specified based on the transcription factors GATA3 and TBX21. Early investigation and anecdotal reports suggest these subtypes may carry important prognostic implications and could predict response to certain therapies (cited Amador et al. as reference 4). Additional studies are needed for further characterization of their clinical relevance.
Treatment of Extranodal Natural Killer/T-Cell Lymphoma
This section was extensively revised.
Treatment of Enteropathy-Associated and Monomorphic Epitheliotropic Intestinal T-Cell Lymphomas
This section was renamed from Treatment of Enteropathy-Type Intestinal T-Cell Lymphoma and extensively revised.
Treatment of Hepatosplenic T-Cell Lymphoma
Added text to state that hepatosplenic T-cell lymphoma is a rare subtype of PTCL comprising approximately 1% of PTCL. Characteristic chromosomal abnormalities such as isochromosome 7q and trisomy 8 are suggestive of the diagnosis (cited Travert et al. as reference 4). While in most cases the neoplastic cells express a gamma delta T-cell receptor, there are reports of alpha beta T-cell receptor expression (cited Macon et al. as reference 5).
Treatment of Adult T-Cell Leukemia/Lymphoma
This section was extensively revised.
Treatment of T-Cell Prolymphocytic Leukemia
This is a new section.
This summary is written and maintained by the
Purpose of This Summary
This PDQ cancer information summary for health professionals provides comprehensive, peer-reviewed, evidence-based information about the treatment of adult peripheral T-cell non-Hodgkin lymphoma. It is intended as a resource to inform and assist clinicians in the care of their patients. It does not provide formal guidelines or recommendations for making health care decisions.
Reviewers and Updates
This summary is reviewed regularly and updated as necessary by the
Board members review recently published articles each month to determine whether an article should:
Changes to the summaries are made through a consensus process in which Board members evaluate the strength of the evidence in the published articles and determine how the article should be included in the summary.
The lead reviewers for Peripheral T-Cell Non-Hodgkin Lymphoma Treatment are:
Any comments or questions about the summary content should be submitted to Cancer.gov through the NCI website's
Levels of Evidence
Some of the reference citations in this summary are accompanied by a level-of-evidence designation. These designations are intended to help readers assess the strength of the evidence supporting the use of specific interventions or approaches. The PDQ Adult Treatment Editorial Board uses a formal evidence ranking system in developing its level-of-evidence designations.
Permission to Use This Summary
PDQ is a registered trademark. Although the content of PDQ documents can be used freely as text, it cannot be identified as an NCI PDQ cancer information summary unless it is presented in its entirety and is regularly updated. However, an author would be permitted to write a sentence such as "NCI's PDQ cancer information summary about breast cancer prevention states the risks succinctly: [include excerpt from the summary]."
The preferred citation for this PDQ summary is:
PDQ® Adult Treatment Editorial Board. PDQ Peripheral T-Cell Non-Hodgkin Lymphoma Treatment. Bethesda, MD: National Cancer Institute. Updated <MM/DD/YYYY>. Available at:
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