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Background and Definitions
AIDS was first described in 1981, and the first definitions included certain opportunistic infections, Kaposi sarcoma, and central nervous system (CNS) lymphomas. In 1984, a multicenter study described the clinical spectrum of non-Hodgkin lymphomas (NHLs) in the populations at risk of AIDS.[
Histology
Pathologically, AIDS-related lymphomas comprise a narrow spectrum of histological types consisting almost exclusively of B-cell tumors of aggressive type. These include:
The HIV-associated lymphomas can be categorized as:
HIV-associated Hodgkin lymphoma
Multiple reviews of HL occurring in patients at risk of AIDS have been done;[
HIV-associated HL presents in an aggressive fashion, often with extranodal or bone marrow involvement.[
Primary effusion lymphoma
Primary effusion lymphoma has been associated with Kaposi sarcoma (KS)-associated herpesvirus (KSHV)/human herpes virus type 8 (HHV8).[
Multicentric Castleman disease
The plasmablastic type of multicentric Castleman disease is also associated with a coinfection of KSHV/HHV8 and HIV.[
Incidence and Prevention
An international database of 48,000 HIV-seropositive individuals from the United States, Europe, and Australia found a 42% decline in the incidence of NHLs from 1997 to 1999 compared with the same incidences in 1992 to 1996, both for PCNSL and for systemic lymphoma.[
Clinical Presentation
In general, the clinical setting and response to treatment of patients with AIDS-related lymphoma is very different from that of the non-HIV patients with lymphoma. The HIV-infected individual with aggressive lymphoma usually presents with advanced-stage disease that is frequently extranodal.[
Common extranodal sites include:
Very unusual sites are also characteristic and include:
The clinical course is more aggressive, and the disease is both more extensive and less responsive to chemotherapy. Immunodeficiency and cytopenias, common in these patients at the time of initial presentation, are exacerbated by the administration of chemotherapy. Treatment of the malignancy increases the risk of opportunistic infections, which further compromise the delivery of adequate treatment.
Prognosis and Survival
Prognoses of patients with AIDS-related lymphoma have been associated with:[
Patients with AIDS-related PCNSL appear to have more severe underlying HIV-related disease than do patients with systemic lymphoma. In one report, this severity was evidenced by patients with PCNSL who had a higher incidence of previously diagnosed AIDS (73% vs. 37%), lower median number of CD4 lymphocytes (30/dL vs. 189/dL), and a worse median survival time (2.5 months vs. 6.0 months).[
In another report (NIAID-ACTG-142), prognostic factors were evaluated in a group of 192 patients with newly diagnosed AIDS-related lymphoma who were randomly assigned to receive either low-dose methotrexate, bleomycin, doxorubicin, cyclophosphamide, vincristine, and dexamethasone (m-BACOD) or standard-dose m-BACOD with granulocyte-macrophage colony-stimulating factor.[
References:
Pathologically, AIDS-related lymphomas comprise a narrow spectrum of histological types consisting almost exclusively of B-cell tumors of aggressive type. These include:
AIDS-related lymphomas, though usually of B-cell origin as demonstrated by immunoglobulin heavy-chain gene rearrangement studies, have also been shown to be oligoclonal, polyclonal, and monoclonal in origin. Although HIV does not appear to have a direct etiologic role, HIV infection does lead to an altered immunologic milieu. HIV generally infects T lymphocytes with the loss of regulation function that leads to hypergammaglobulinemia and polyclonal B-cell hyperplasia. B cells are not the targets of HIV infection. Instead, Epstein-Barr virus (EBV) is thought to be at least a cofactor in the etiology of some of these lymphomas. The EBV genome has been detected in most patients with AIDS-related lymphomas; molecular analysis suggests that the cells were infected before clonal proliferation began.[
References:
Although stage is important in selecting the treatment of patients with non-Hodgkin lymphoma (NHL) who do not have AIDS, most patients with AIDS-related lymphomas have far-advanced disease.
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; ornoncontiguous extralymphatic organ involvement in conjunction with nodal stage II disease; orany extralymphatic organ involvement in nodal stage III disease. Stage IV includesany involvement of the CSF, bone marrow, liver, or lungs (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 = marrow |
S = spleen | P = pleura | O = bone | D = skin |
Current practice assigns a clinical stage (CS) based on the findings of the clinical evaluation and a pathological stage (PS) based on the findings made as a result of invasive procedures beyond the initial biopsy.
For example, on percutaneous biopsy, a patient with inguinal adenopathy and a positive lymphangiogram without systemic symptoms might be found to have involvement of the liver and bone marrow. The precise stage of such a patient would be CS IIA, PS IVA(H+)(M+).
A number of 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:
References:
The treatment of patients with AIDS-related lymphomas presents the challenge of integrating therapy appropriate for the stage and histological subset of malignant lymphoma with the limitations imposed by HIV infection.[
Patients with HIV positivity and underlying immunodeficiency have poor bone marrow reserve, which compromises the potential for drug dose intensity. Intercurrent opportunistic infection is a risk that may also lead to a decrease in drug delivery. Furthermore, chemotherapy itself compromises the immune system and increases the likelihood of opportunistic infection.
References:
The treatment of AIDS-related lymphomas involves overcoming several problems. These are all aggressive lymphomas, which by definition are diffuse large cell/immunoblastic lymphoma or small noncleaved cell lymphoma (Burkitt lymphoma). These lymphomas frequently involve the bone marrow and central nervous system (CNS) and, therefore, are usually in an advanced stage. In addition, the immunodeficiency of AIDS and the leukopenia that is commonly seen with HIV infection makes the use of immunosuppressive chemotherapy challenging.
The introduction of highly active antiretroviral therapy (HAART) has led to a marked reduction in opportunistic infections, prolonged survival with HIV infection, and a median overall survival (OS) for patients with AIDS-related lymphoma that is comparable with the outcome in the nonimmunosuppressed population.[
Several prospective nonrandomized trials and pooled individual data from 19 prospective trials that included 1,546 patients show that the addition of rituximab to combination chemotherapy improves the complete response rate, progression-free survival, and OS.[
For patients with Burkitt lymphoma, dose-modified regimens such as R-CODOX (cyclophosphamide, doxorubicin, vincristine, methotrexate, cytarabine and rituximab)-M/IVAC (ifosfamide, etoposide, and high-dose cytarabine) or R-EPOCH (etoposide, prednisone, vincristine, and doxorubicin in combination with rituximab) have shown good results with concurrent or sequential HAART.[
Patients at risk of subsequent CNS involvement include those with bone marrow involvement or those with EBV identified in the primary tumor or in the cerebrospinal fluid (i.e., by polymerase chain reaction).[
Highly selected patients with resistant or relapsed lymphoma after first-line chemotherapy and with continued responsiveness to HAART underwent second-line chemotherapy followed by high-dose therapy and autologous peripheral stem cell transplant. Long-term survivors have been reported anecdotally for these highly selected patients who relapsed.[
Current Clinical Trials
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References:
As with other AIDS-related lymphomas, primary central nervous system (CNS) lymphoma (PCNSL) is an aggressive B-cell neoplasm, either diffuse large B-cell or diffuse immunoblastic non-Hodgkin lymphoma (a subtype of diffuse large B-cell lymphoma). AIDS-related PCNSL has been reported to have a 100% association with Epstein-Barr virus (EBV).[
Computed tomographic scans show contrast-enhancing mass lesions that may not always be distinguished from other CNS diseases, such as toxoplasmosis, that occur in patients with AIDS.[
Radiation therapy alone has usually been used in this group of patients. With doses in the range of 35 Gy to 40 Gy, median duration of survival has been only 72 to 119 days.[
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 AIDS-related 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 AIDS-Related 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 AIDS-Related Lymphoma Treatment. Bethesda, MD: National Cancer Institute. Updated <MM/DD/YYYY>. Available at:
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Last Revised: 2024-09-18
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