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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), adult T-cell leukemia/lymphoma (ATLL), enteropathy-associated T-cell lymphoma (EATL), hepatosplenic T-cell lymphoma (HSTCL), 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).[
ALCL in children is usually characterized by systemic and cutaneous disease and has high response rates and good OS with doxorubicin-based combination chemotherapy.[
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.
Current Clinical Trials
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References:
Angioimmunoblastic T-cell lymphoma (AITL or ATCL) was formerly called angioimmunoblastic lymphadenopathy with dysproteinemia. Characterized by clonal T-cell receptor gene rearrangement, this entity is treated like diffuse large B-cell lymphoma, using cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP) (without rituximab).[
Doxorubicin-based combination chemotherapy, such as the CHOP regimen, is commonly used for AITL, as it is for other aggressive lymphomas.[
The International Peripheral T-Cell Lymphoma Project involving 22 international centers identified 243 patients with AITL or ATCL; 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 CD4 or CD8 but not both together.[
Prognosis
Most investigators report worse response and survival rates for patients with PTCL-NOS than for patients with comparably staged B-cell aggressive lymphomas.[
Therapeutic Approaches
Therapy involves doxorubicin-based combination chemotherapy such as cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP) or CHOP plus etoposide (CHOPE). 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.[
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.[
The increased risk of central nervous system involvement and of local recurrence has led to recommendations for local radiation therapy given before the start of chemotherapy or between cycle two and three of chemotherapy, and for intrathecal prophylaxis and/or prophylactic cranial radiation therapy.[
Higher doses of radiation therapy administered at more than 50 Gy are associated with improved outcomes according to anecdotal reports.[
Treatment with pembrolizumab, an anti-programmed cell death protein 1 (PD-1) antibody, resulted in similar responses in patients with relapsed or refractory disease.[
Current Clinical Trials
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References:
Enteropathy-type intestinal T-cell lymphoma involves the small bowel of patients with gluten-sensitive enteropathy (celiac sprue).[
Therapy is with doxorubicin-based combination chemotherapy, but relapse rates appear higher than for comparably staged diffuse large cell lymphoma.[
Current Clinical Trials
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References:
Hepatosplenic T-cell lymphoma (HSTCL) is an unusual type of peripheral T-cell lymphoma occurring mostly in young men. HSTCL appears to be localized to the hepatic and splenic sinusoids, with cell surface expression of the T-cell receptor gamma/delta.[
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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References:
Adult T-cell leukemia/lymphoma (ATLL) is caused by infection with the retrovirus human T-lymphotrophic virus 1 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.[
The acute and lymphoma types of ATLL respond poorly to combination chemotherapy and allogeneic stem cell transplant (SCT), with a median overall survival (OS) under 1 year.[
The combination of zidovudine and interferon-alpha has activity against ATLL, even for patients who failed previous cytotoxic therapy. Durable remissions are seen in most patients treated with this combination, but are not seen in patients with the lymphoma subtype of ATLL.[
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 the following:
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.
Editorial changes were made to this summary.
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.
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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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Last Revised: 2024-04-05
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