Hodgkin's lymphoma


Hodgkin's lymphoma
Hodgkin lymphoma
Classification and external resources

Micrograph showing Hodgkin's lymphoma (Field stain).
ICD-10 C81
ICD-9 201
ICD-O: 9650/3-9667/3
DiseasesDB 5973
MedlinePlus 000580
eMedicine med/1022
MeSH D006689

Hodgkin's lymphoma, previously known as Hodgkin's disease, is a type of lymphoma, which is a cancer originating from white blood cells called lymphocytes. It was named after Thomas Hodgkin, who first described abnormalities in the lymph system in 1832.[1][2] Hodgkin's lymphoma is characterized by the orderly spread of disease from one lymph node group to another and by the development of systemic symptoms with advanced disease. When Hodgkins cells are examined microscopically, multinucleated Reed-Sternberg cells (RS cells) are the characteristic histopathologic finding. Hodgkin's lymphoma may be treated with radiation therapy, chemotherapy or hematopoietic stem cell transplantation, the choice of treatment depending on the age and sex of the patient and the stage, bulk and histological subtype of the disease.

The disease occurrence shows two peaks: the first in young adulthood (age 15–35) and the second in those over 55 years old.[3]

The 10-year overall survival rate is more than 90% for any stage, though early diagnosis may help. Since many patients are young, they often live 40 years or more after treatment. However, few studies follow patients as long as 25 years, and those studies are of older treatments with more life-threatening adverse effects, so it is impossible to predict long-term outcomes of newer, less harmful treatments. Radiation treatments, and some chemotherapy drugs, pose a risk of causing potentially fatal secondary cancers, heart disease, and lung disease 40 or more years later. Modern treatments greatly minimize the chances of these late effects.[4]

Patients with a history of infectious mononucleosis due to Epstein-Barr virus may have an increased risk of HL, but the precise contribution of Epstein-Barr virus remains largely unknown.[5]

Contents

Classification

Types

Classical Hodgkin's lymphoma (excluding nodular lymphocyte predominant Hodgkin's lymphoma) can be subclassified into 4 pathologic subtypes based upon Reed-Sternberg cell morphology and the composition of the reactive cell infiltrate seen in the lymph node biopsy specimen (the cell composition around the Reed-Sternberg cell(s)).

Name Description ICD-10 ICD-O
Nodular sclerosing HL Is the most common subtype and is composed of large tumor nodules showing scattered lacunar classical RS cells set in a background of reactive lymphocytes, eosinophils and plasma cells with varying degrees of collagen fibrosis/sclerosis. C81.1 M9663/3
Mixed-cellularity subtype Is a common subtype and is composed of numerous classic RS cells admixed with numerous inflammatory cells including lymphocytes, histiocytes, eosinophils, and plasma cells without sclerosis. This type is most often associated with EBV infection and may be confused with the early, so-called 'cellular' phase of nodular sclerosing CHL. C81.2 M9652/3.
Lymphocyte-rich or Lymphocytic predominance Is a rare subtype, show many features which may cause diagnostic confusion with nodular lymphocyte predominant B-cell Non-Hodgkin's Lymphoma (B-NHL). This form also has the most favorable prognosis. C81.0 M9651/3
Lymphocyte depleted Is a rare subtype, composed of large numbers of often pleomorphic RS cells with only few reactive lymphocytes which may easily be confused with diffuse large cell lymphoma. Many cases previously classified within this category would now be reclassified under anaplastic large cell lymphoma.[6] C81.3 M9653/3
Unspecified C81.9 M9650/3
Lymph node biopsy showing Hodgkin's lymphoma, mixed-cellularity type.
CT image of a 46-year-old patient with Hodgkin's lymphoma, image at neck height. On the left side of the patient's neck enlarged lymph nodes are visible (marked in red).

Nodular lymphocyte predominant Hodgkin's lymphoma expresses CD20, and is not currently considered a form of classical Hodgkin's.

For the other forms, although the traditional B cell markers (such as CD20) are not expressed on all cells,[6] Reed-Sternberg cells are usually of B cell origin.[7][8] Although Hodgkin's is now frequently grouped with other B cell malignancies, some T cell markers (such as CD2 and CD4) are occasionally expressed.[9] However, this may be an artifact of the ambiguity inherent in the diagnosis.

Hodgkin's cells produce Interleukin-21 (IL-21), which was once thought to be exclusive to T cells. This feature may explain the behavior of classical Hodgkin's lymphoma, including clusters of other immune cells gathered around HL cells (infiltrate) in cultures.[10]

Staging

The staging is the same for both Hodgkin's as well as non-Hodgkin's lymphomas.

After Hodgkin's lymphoma is diagnosed, a patient will be staged: that is, they will undergo a series of tests and procedures that will determine what areas of the body are affected. These procedures will include documentation of their histology, a physical examination, blood tests, chest X-ray radiographs, computed tomography (CT) scans or magnetic resonance imaging (MRI) scans of the chest, abdomen and pelvis, and a bone marrow biopsy. Positron emission tomography (PET) scan is now used instead of the gallium scan for staging. In the past, a lymphangiogram or surgical laparotomy (which involves opening the abdominal cavity and visually inspecting for tumors) were performed. Lymphangiograms or laparotomies are very rarely performed, having been supplanted by improvements in imaging with the CT scan and PET scan.

On the basis of this staging, the patient will be classified according to a staging classification (the Ann Arbor staging classification scheme is a common one):

  • Stage I is involvement of a single lymph node region (I) (mostly the cervical region) or single extralymphatic site (Ie);
  • Stage II is involvement of two or more lymph node regions on the same side of the diaphragm (II) or of one lymph node region and a contiguous extralymphatic site (IIe);
  • Stage III is involvement of lymph node regions on both sides of the diaphragm, which may include the spleen (IIIs) and/or limited contiguous extralymphatic organ or site (IIIe, IIIes);
  • Stage IV is disseminated involvement of one or more extralymphatic organs.

The absence of systemic symptoms is signified by adding 'A' to the stage; the presence of systemic symptoms is signified by adding 'B' to the stage. For localized extranodal extension from mass of nodes that does not advance the stage, subscript 'E' is added.

Signs and symptoms

Patients with Hodgkin's lymphoma may present with the following symptoms:

  • Itchy Skin
  • Night sweats
  • Unexplained weight loss
  • Lymph nodes: the most common symptom of Hodgkin's is the painless enlargement of one or more lymph nodes. The nodes may also feel rubbery and swollen when examined. The nodes of the neck and shoulders (cervical and supraclavicular) are most frequently involved (80–90% of the time, on average). The lymph nodes of the chest are often affected, and these may be noticed on a chest radiograph.
  • Splenomegaly: enlargement of the spleen occurs in about 30% of people with Hodgkin's lymphoma. The enlargement, however, is seldom massive and the size of the spleen may fluctuate during the course of treatment.
  • Hepatomegaly: enlargement of the liver, due to liver involvement, is present in about 5% of cases.
  • Hepatosplenomegaly: the enlargement of both the liver and spleen caused by the same disease.
  • Pain following alcohol consumption: classically, involved nodes are painful after alcohol consumption, though this phenomenon is very uncommon,[11] occurring in only two to three percent of people with Hodgkin's lymphoma,[12] thus having a low sensitivity. On the other hand, its specificity is high enough for it to be regarded as a pathognomonic sign of Hodgkin's lymphoma.[12] The pain typically has an onset within minutes after ingesting alcohol, and is usually felt as coming from the vicinity where there is an involved lymph node.[12] The pain has been described as either sharp and stabbing or dull and aching.[12]
  • Back pain: nonspecific back pain (pain that cannot be localized or its cause determined by examination or scanning techniques) has been reported in some cases of Hodgkin's lymphoma. The lower back is most often affected.[citation needed]
  • Red-coloured patches on the skin, easy bleeding and petechiae due to low platelet count (as a result of bone marrow infiltration, increased trapping in the spleen etc. – i.e. decreased production, increased removal)
  • Systemic symptoms: about one-third of patients with Hodgkin's disease may also present with systemic symptoms, including low-grade fever; night sweats; unexplained weight loss of at least 10% of the patient's total body mass in six months or less, itchy skin (pruritus) due to increased levels of eosinophils in the bloodstream; or fatigue (lassitude). Systemic symptoms such as fever, night sweats, and weight loss are known as B symptoms; thus, presence of fever, weight loss, and night sweats indicate that the patient's stage is, for example, 2B instead of 2A.[13]
  • Cyclical fever: patients may also present with a cyclical high-grade fever known as the Pel-Ebstein fever,[14] or more simply "P-E fever". However, there is debate as to whether or not the P-E fever truly exists.[15]

Cause

There are no guidelines for preventing Hodgkin's lymphoma; this is because the cause is unknown or multifactorial. A risk factor is something that statistically increases one's chance of contracting a disease or condition. Risk factors for Hodgkin's lymphoma include:

Diagnosis

Hodgkin's lymphoma must be distinguished from non-cancerous causes of lymph node swelling (such as various infections) and from other types of cancer. Definitive diagnosis is by lymph node biopsy (usually excisional biopsy with microscopic examination). Blood tests are also performed to assess function of major organs and to assess safety for chemotherapy. Positron emission tomography (PET) is used to detect small deposits that do not show on CT scanning. PET scans are also useful in functional imaging (by using a radiolabeled glucose to image tissues of high metabolism). In some cases a Gallium Scan may be used instead of a PET scan.

Pathology

Macroscopy

Affected lymph nodes (most often, laterocervical lymph nodes) are enlarged, but their shape is preserved because the capsule is not invaded. Usually, the cut surface is white-grey and uniform; in some histological subtypes (e.g. nodular sclerosis) a nodular aspect may appear.

A fibrin ring granuloma may be seen.

Microscopy
Micrograph of a classic Reed-Sternberg cell.
Micrograph showing a "popcorn cell", the Reed-Sternberg cell variant seen in nodular lymphocyte predominant Hodgkin lymphoma.H&E stain.

Microscopic examination of the lymph node biopsy reveals complete or partial effacement of the lymph node architecture by scattered large malignant cells known as Reed-Sternberg cells (RSC) (typical and variants) admixed within a reactive cell infiltrate composed of variable proportions of lymphocytes, histiocytes, eosinophils, and plasma cells. The Reed-Sternberg cells are identified as large often bi-nucleated cells with prominent nucleoli and an unusual CD45-, CD30+, CD15+/- immunophenotype. In approximately 50% of cases, the Reed-Sternberg cells are infected by the Epstein-Barr virus.

Characteristics of classic Reed-Sternberg cells include large size (20–50 micrometres), abundant, amphophilic, finely granular/homogeneous cytoplasm; two mirror-image nuclei (owl eyes) each with an eosinophilic nucleolus and a thick nuclear membrane (chromatin is distributed at the cell periphery).

Variants:

  • Hodgkin cell (atypical mononuclear RSC) is a variant of RS cell, which has the same characteristics, but is mononucleated.
  • Lacunar RSC is large, with a single hyperlobated nucleus, multiple, small nucleoli and eosinophilic cytoplasm which is retracted around the nucleus, creating an empty space ("lacunae").
  • Pleomorphic RSC has multiple irregular nuclei.
  • "Popcorn" RSC (lympho-histiocytic variant) is a small cell, with a very lobulated nucleus, small nucleoli.
  • "Mummy" RSC has a compact nucleus, no nucleolus and basophilic cytoplasm.

Hodgkin's lymphoma can be sub-classified by histological type. The cell histology in Hodgkin's lymphoma is not as important as it is in non-Hodgkin's lymphoma: the treatment and prognosis in classic Hodgkin's lymphoma usually depends on the stage of disease rather than the histotype.

Management

Patients with early stage disease (IA or IIA) are effectively treated with radiation therapy or chemotherapy. The choice of treatment depends on the age, sex, bulk and the histological subtype of the disease. Patients with later disease (III, IVA, or IVB) are treated with combination chemotherapy alone. Patients of any stage with a large mass in the chest are usually treated with combined chemotherapy and radiation therapy.

ABVD Stanford V BEACOPP
Currently, the ABVD chemotherapy regimen is the standard treatment of Hodgkin's disease in the US. The abbreviation stands for the four drugs Adriamycin, bleomycin, vinblastine, and dacarbazine. Developed in Italy in the 1970s, the ABVD treatment typically takes between six and eight months, although longer treatments may be required. The newer Stanford V regimen is typically only half as long as the ABVD but involves a more intensive chemotherapy schedule and incorporates radiation therapy. In a randomized controlled study in Italy, Stanford V was inferior to ABVD.[17] BEACOPP is a form of treatment for stages > II mainly used in Europe. The cure rate with the BEACOPP esc. regimen is approximately 10–15% higher than with standard ABVD in advanced stages. This was shown in a paper in The New England Journal of Medicine (Diehl et al.), but US physicians still favor ABVD, maybe because some physicians think that BEACOPP induces more secondary leukemia. However, this seems negligible compared to the higher cure rates. BEACOPP is more expensive because of the requirement for concurrent treatment with GCSF to increase production of white blood cells. Currently, the German Hodgkin Study Group tests 8 cycles (8x) BEACOPP esc vs. 6x BEACOPP esc vs. 8x BEACOPP-14 baseline (HD15-trial).[18]
Doxorubicin Doxorubicin Doxorubicin
Bleomycin Bleomycin Bleomycin
Vinblastine Vinblastine, Vincristine Vincristine
Dacarbazine Mechlorethamine Cyclophosphamide, Procarbazine
Etoposide Etoposide
Prednisone Prednisone

It should be noted that the common non-Hodgkin's treatment, rituximab (which is a monoclonal antibody against CD20) is not routinely used to treat Hodgkin's lymphoma due to the lack of CD20 surface antigens in most cases. The use of rituximab in Hodgkin's lymphoma, including the lymphocyte predominant subtype has been reviewed recently.[19]

Although increased age is an adverse risk factor for Hodgkin's lymphoma, in general elderly patients without major comorbidities are sufficiently fit to tolerate standard therapy, and have a treatment outcome comparable to that of younger patients. However, the disease is a different entity in older patients and different considerations enter into treatment decisions.[20]

For Hodgkin's lymphomas, radiation oncologists typically use external beam radiation therapy (sometimes shortened to EBRT). Radiation oncologists deliver external beam radiation therapy to the lymphoma from a machine called a linear accelerator. Patients usually describe treatments as painless and similar to getting an X-ray. Treatments last less than 30 minutes each, every day but Saturday and Sunday.

For lymphomas, there are a few different ways radiation oncologists target the cancer cells. Involved field radiation is when the radiation oncologists give radiation only to those parts of the patient's body known to have the cancer. Very often, this is combined with chemotherapy. Radiation therapy directed above the diaphragm to the neck, chest and/or underarms is called mantle field radiation. Radiation to below the diaphragm to the abdomen, spleen and/or pelvis is called inverted-Y field radiation. Total nodal irradiation is when the therapist gives radiation to all the lymph nodes in the body to destroy cells that may have spread.[21]

The high cure rates and long survival of many patients with Hodgkin's lymphoma has led to a high concern with late adverse effects of treatment, including cardiovascular disease and second malignancies such as acute leukemias, lymphomas, and solid tumors within the radiation therapy field. Most patients with early-stage disease are now treated with abbreviated chemotherapy and involved-field radiation therapy rather than with radiation therapy alone. Clinical research strategies are exploring reduction of the duration of chemotherapy and dose and volume of radiation therapy in an attempt to reduce late morbidity and mortality of treatment while maintaining high cure rates. Hospitals are also treating those who respond quickly to chemotherapy with no radiation.

Prognosis

Treatment of Hodgkin's disease has been improving over the past few decades. Recent trials that have made use of new types of chemotherapy have indicated higher survival rates than have previously been seen. In one recent European trial, the 5-year survival rate for those patients with a favorable prognosis was 98%, while that for patients with worse outlooks was at least 85%.[22]

In 1998, an international effort[23] identified seven prognostic factors that accurately predict the success rate of conventional treatment in patients with locally extensive or advanced stage Hodgkin's lymphoma. Freedom from progression (FFP) at 5 years was directly related to the number of factors present in a patient. The 5-year FFP for patients with zero factors is 84%. Each additional factor lowers the 5-year FFP rate by 7%, such that the 5-year FFP for a patient with 5 or more factors is 42%.

The adverse prognostic factors identified in the international study are:

  • Age ≥ 45 years
  • Stage IV disease
  • Hemoglobin < 10.5 g/dl
  • Lymphocyte count < 600/µl or < 8%
  • Male
  • Albumin < 4.0 g/dl
  • White blood count ≥ 15,000/µl

Other studies have reported the following to be the most important adverse prognostic factors: mixed-cellularity or lymphocyte-depleted histologies, male sex, large number of involved nodal sites, advanced stage, age of 40 years or more, the presence of B symptoms, high erythrocyte sedimentation rate, and bulky disease (widening of the mediastinum by more than one third, or the presence of a nodal mass measuring more than 10 cm in any dimension.)

Epidemiology

Age-standardized death from lymphomas and multiple myeloma per 100,000 inhabitants in 2004.[24]
  no data
  less than 1.8
  1.8–3.6
  3.6–5.4
  5.4–7.2
  7.2–9
  9–10.8
  10.8–12.6
  12.6–14.4
  14.4–16.2
  16.2–18
  18–19.8
  more than 19.8

Unlike some other lymphomas, whose incidence increases with age, Hodgkin's lymphoma has a bimodal incidence curve; that is, it occurs most frequently in two separate age groups, the first being young adulthood (age 15–35) and the second being in those over 55 years old although these peaks may vary slightly with nationality.[25] Overall, it is more common in males, except for the nodular sclerosis variant, which is slightly more common in females. The annual incidence of Hodgkin's lymphoma is about 1 in 25,000 people, and the disease accounts for slightly less than 1% of all cancers worldwide.

The incidence of Hodgkin's lymphoma is increased in patients with HIV infection.[26] In contrast to many other lymphomas associated with HIV infection it occurs most commonly in patients with higher CD4 T cell counts.

History

Photograph from a 1938 medical textbook labeled "Hodgkin's Disease", (Essentials of medicine)

Hodgkin's lymphoma was first described in an 1832 report by Thomas Hodgkin, although Hodgkin noted that perhaps the earliest reference to the condition was provided by Marcello Malpighi in 1666.[1][2] While occupied as museum curator at Guy's Hospital, Hodgkin studied seven patients with painless lymph node enlargement. Of the seven cases, two were patients of Richard Bright, one was of Thomas Addison, and one was of Robert Carswell.[1] Carswell's report of this seventh patient was accompanied by numerous illustrations that aided early descriptions of the disease.[27]

Hodgkin's report on these seven patients, entitled "On some morbid appearances of the absorbent glands and spleen", was presented to the Medical and Chirurgical Society in London in January 1832 and was subsequently published in the society's journal, Medical-Chirurgical Society Transactions.[1] Hodgkin's paper went largely unnoticed, however, even despite Bright highlighting it in an 1838 publication.[1] Indeed, Hodgkin himself did not view his contribution as particularly significant.[28]

In 1856, Samuel Wilks independently reported on a series of patients with the same disease that Hodgkin had previously described.[28] Wilks, a successor to Hodgkin at Guy's Hospital, was unaware of Hodgkin's prior work on the subject. Bright made Wilks aware of Hodgkin's contribution and in 1865, Wilks published a second paper, entitled "Cases of enlargement of the lymphatic glands and spleen", in which he called the disease "Hodgkin's disease" in honor of his predecessor.[28]

Theodor Langhans and WS Greenfield first described the microscopic characteristics of Hodgkin's lymphoma in 1872 and 1878, respectively.[1] In 1898 and 1902, respectively, Carl Sternberg and Dorothy Reed independently described the cytogenetic features of the malignant cells of Hodgkin's lymphoma, now called Reed-Sternberg cells.[1]

Tissue specimens from Hodgkin's seven patients remained at Guy's Hospital for a number of years. Nearly 100 years after Hodgkin's initial publication, histopathologic reexamination confirmed Hodgkin's lymphoma in only three of seven of these patients.[28] The remaining cases included non-Hodgkin lymphoma, tuberculosis, and syphilis.[28]

Hodgkin's lymphoma was one of the first cancers which could be treated using radiation therapy and, later, it was one of the first to be treated by combination chemotherapy.

Society and culture

Notable cases

  • Don Cohan, oldest U.S. Olympic bronze medalist at the age of 42, diagnosed with stage IVB Hodgkins disease, defeated it twice, and then won a U.S. championship in sailing at the age of 72.[29]
  • Howard Carter, Egyptologist and discoverer of the Tomb of Tutankhamum, died in 1939 from Hodgkin's disease[30]
  • Jörg Kühn, Swiss artist, naturalist and scientific illustrator who specialized in animal, bird and medical paintings died age 24 years old in 1964.[31]
  • Prithviraj Kapoor, a noted pioneer of Indian theatre and of the Hindi film industry died of Hodgkin's disease in 1972.[32]
  • Paul Allen, Microsoft co-founder, was diagnosed and treated for Hodgkin's lymphoma in 1983.[33] He subsequently developed non-Hodgkin's lymphoma in November 2009[34]
  • DJ Qualls was diagnosed with Hodgkin's lymphoma at age 14, and after two years of treatment, his cancer was said to be in remission.
  • Alese Coco (1984–2007). American woman who founded the non-profit organization Fight 2 Win Campaign to raise money for Hodgkin’s research and awareness.[35]
  • Lynden David Hall died of Hodgkin's lymphoma in 2006.[36]
  • Delta Goodrem, Australian singer, was diagnosed with Hodgkin's lymphoma in July 2003[37]
  • Freida J. Riley, teacher, influential in early career of Homer Hickam, featured in October Sky, died aged 31.
  • Richard Harris, Irish actor, died from the condition in 2002[38]
  • Dinu Lipatti, the Romanian pianist, died of Hodgkin's disease in 1950, aged 33[39]
  • Craig Wedren, lead singer of Shudder to Think and the lead for the newer pop-mash project, "BABY". In remission.[40]
  • Mario Lemieux, National Hockey League forward, was diagnosed with Hodgkin's lymphoma in 1993[41]
  • Luke Menard, a finalist on the seventh season of American Idol, was diagnosed with the disease after being voted off the show.[42]
  • Starchild Abraham Cherrix, a teenager whose refusal to undergo further conventional treatment after relapsing resulted in a court battle and a change to Virginia laws about medical neglect.[43]
  • Big John Studd, Wrestler John William Minton, died from the disease in 1995[44]
  • Emma Lazarus, Jewish-American poet and author of "The New Colossus," the poem at the base of the Statue of Liberty, died from the disease in 1887[45]
  • Brandon Tartikoff, American television executive, died from the disease in 1997.[46]
  • Ethan Zohn, Won Survivor: Africa[47]
  • Daniel Hauser, whose mother fled with him in order to prevent him from undergoing chemotherapy.[48]
  • Michael C. Hall, American actor (Dexter, Six Feet Under), in remission as of April 2010.[49]
  • Wesley Coe, American silver medalist in the 1904 Olympics, died of Hodgkin's lymphoma.[50]
  • Mamta Mohandas, Indian actress, survived the disease in November 2010.[51]
  • Martyn Bennett, renowned Scottish musician died from the disease in 2005.[52]
  • Alisa Kleybanova, Professional WTA tennis player, was diagnosed on 14 July 2011. Currently undergoing treatment in Italy.
  • Lawrence Summers, Harvard Economist, Former President of Harvard University, Former Secretary of the Treasury, Former Chair of National Economics Council.
  • Facundo Arana, Argentine actor, was diagnosed with Hodgkin's disease. Arana received treatment for much of 1989 and underwent regular testing until 1994, when he was finally declared cancer-free.
  • Richard Patteson, Carribeanist and literary commentator on Robert Antoni, June 2010

See also

Further reading

  • Charlotte DeCroes Jacobs. Henry Kaplan and the Story of Hodgkin's Disease (Stanford University Press; 2010) 456 pages; combines a biography of the American radiation oncologist (1918–84) with a history of the lymphatic cancer whose treatment he helped to transform.

References

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Look at other dictionaries:

  • Hodgkin's lymphoma — n HODGKIN S DISEASE …   Medical dictionary

  • Hodgkin's lymphoma — noun see Hodgkin s disease …   New Collegiate Dictionary

  • Hodgkin's lymphoma — noun A malignant lymphoid neoplasm characterized by the formation of large tumour cells (Reed Sternberg cells) in the lymph nodes …   Wiktionary

  • Nodular lymphocyte predominant Hodgkin's lymphoma — Classification and external resources Micrograph of a lymph node biopsy showi …   Wikipedia

  • non-Hodgkin's lymphoma — non Hodg·kin s lymphoma häj kənz n any of various malignant lymphomas (as Burkitt s lymphoma) that are not classified as Hodgkin s disease and that usu. have malignant cells derived from B cells or T cells * * * see lymphoma …   Medical dictionary

  • non-Hodgkin's lymphoma — noun Date: 1972 any of the numerous malignant lymphomas (as Burkitt s lymphoma) that are not classified as Hodgkin s disease …   New Collegiate Dictionary

  • non-Hodgkin's lymphoma — noun Medicine a form of malignant lymphoma differing from Hodgkin s disease only by the absence of characteristic giant cells …   English new terms dictionary

  • non-hodgkin's lymphoma — ¦ ̷ ̷ ˌ. . . noun Usage: usually capitalized H : any of the numerous malignant lymphomas (as Burkitt s lymphoma) that are not classified as Hodgkin s disease and that usually have malignant cells derived from B cells or T cells …   Useful english dictionary

  • non-Hodgkin's lymphoma — see lymphoma …   The new mediacal dictionary

  • non-Hodgkin's lymphoma — Pathol. any of several malignancies of the lymphatic system in which the cells characteristic of Hodgkin s disease are absent. * * * …   Universalium


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