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Query: UMLS:C0019829 (Hodgkin's disease)
 30,247 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Although the term thymic hyperplasia is used most commonly to indicate the occurrence of germinal centers in the thymus, cognizance must be taken of the fact that such centers may occur in apparently normal thymuses in both children and adults. A concept of thymic compartmentalization is proposed with origin of germinal centers in the perivascular space (extraparenchymal compartment) of the thymus. These germinal centers contain a high percentage of B lymphocytes in contrast to the true thymic parenchyma. Although the significance of germinal centers in the thymus parenchyma. Although the significance of germinal centers in the thymus in myasthenia gravis remains controversial, removal of nonneoplastic thymus in this condition is of proven therapeutic value. A variety of neoplasms originating in the thymus have previously been lumped together under the single term "thymoma." It is apparent, however, that thymoma, thymic carcinoid, various lymphomas, and germ cell tumors that arise in the thymus differ not only pathologically but also in their clinical behavior. Thymoma is regarded as an epithelial neoplasm and ultrastucturally is characterized by many desmosomes and tonofilaments. The lymphocytes do not behave in a malignant manner, and lymphomas of the thymus should be sharply separated from true thymoma. Poorly differentiated thymic carcinoma and histiocytic lymphoma may be distinguishable only by the electron microscopic demonstration of desmosomes and filaments in the thymic carcinoma. The evidence that Hodgkin's disease of the thymus ("granulomatous thymoma") is not a variant of thymoma appears overwhelming. Lymphoblastic lymphoma of the thymus is a distinctive neoplasm that is especially prevalent in teenage males. High levels of terminal transferase characterize the lymphoblasts and there is a striking tendency for leukemia to occur. Thymic carcinoid is usually nonfunctional, although one-third of the reported cases are associated with Cushing's syndrome. On light microscopy a ribbon pattern and punctate necroses are characteristic of thymic carcinoids. Electron microscopic demonstration of many dense core granules is invaluable in establishing this diagnosis. An important clue to the diagnosis of thymic seminoma (a neoplasm that shows the same radiosensitivity as its testicular counterpart) is the frequent presence of epithelioid and giant cell granulomas and germinal centers. Separation of the various thymic neoplasms described not only is justifiable on pathologic grounds but is often essential for appropriate patient investigation and treatment.
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PMID:Thymic hyperplasia and neoplasia: a review of current concepts. 36 41

Combined application of morphologic, immunochemical, and immunologic methods has led to a reinterpretation of non-Hodgkin's lymphomas and to the establishment of the Kiel classification. In the present paper, the main Ig-producing entities are considered. These are: 1. Chronic lymphocytic leukemia of the B-type (B-CLL)--a proliferation of lymphocytes and a few so-called prolymphocytes and lymphoblasts. The mean tissue IgM value is slightly increased; the serum IgM level is normal or reduced. The tumor cells bear SIg, and a majority of them have a receptor for C3d but always lack CIg and are usually devoid of receptors for C3b. 2. Lymphoplasmacytoid immunocytoma--a mixed proliferation of lymphocytes and centrocytes, blast cells, plasma cells, or plasmacytoid cells. The tissue Ig content is most often (91%) and most highly increased in this group, whereas the serum Ig level is increased in only 20% of the cases. The tissue IgM of 17 cases was shown to be monoclonal by IEF. Most tumor cells have SIg and a variable numbear CIg. The tumor cells bear both complement receptor subtypes, only a receptor for C3b, or no complement receptors at all. 3. Centroblastic/centrocytic lymphoma--usually a follicular proliferation of abundant small germinal center cells (centrocytes) and some large germinal center cells (centroblasts). The tumor cells bear SIg and both complement receptor subtypes. The C3b- and C3d-positive cells are located in the follicles, as in nonneoplastic lymphatic tissue. 4. Centrocytic lymphoma--a purebred, diffuse proliferation of the small germinal center cells (centrocytes). These cells bear SIg and receptors for C3b and C3d but usually lack CIg. 5. Centroblastic lymphoma--a proliferation of the large germinal center cells (centroblasts). 6. Lymphoblastic lymphoma of Burkitt's type. 7. Immunoblastic lymphoma--a diffuse proliferation of large basophillic cells resembling immunoblasts. The tissue IgM content is increased in 60% of the cases. It proved to be monoclonal with IEF in all five cases studied. The cells of five cases with increased tissue Ig content bore SIg. Nearly half of the cases studied showed CIg. Besides non-Hodgkin's lymphomas, paraffin sections of 87 biopsies from Hodgkin's disease were investigated for CIg in Hodgkin's and Sternberg-Reed cells. These cells stained positively in 68 cases, most often for IgG, followed by IgD. In five cases of the lymphocyte-depleted type, the staining of the Hodgkin's and Sternberg-Reed cells was restricted to one light chain type.
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PMID:Demonstration of immunoglobulin production by tumor cells in non-Hodgkin's and Hodgkin's malignant lymphomas and its significance for their classification. 36 94

The significance of typing and subtyping in the survival rate of 116 patients suffering from pathologically proved malignant lymphoma is presented. Our data show that Hodgkin's disease was least malignant, having the highest survival curve (P less than 0.005). Lymphoblastic lymphoma had the highest degree of malignancy, having the lowest survival curve. Yet, the middle portion of its curve resembled that of the peripheral T cell lymphoma. Although the degree of malignancy and the curve of peripheral T cell lymphoma and B cell lymphoma were similar (0.05 greater than P greater than 0.05), their middle portion were separated, a fact worthy of further study. Typing of malignant lymphomas is of practical importance.
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PMID:[Significance of typing in the survival of malignant lymphomas]. 139 57

From 1983 to 1988, non-Hodgkin's lymphoma was diagnosed in 169 patients ranging from 19 to 89 years of age (mean 49). They were investigated using both unifactorial and multivariate regression (Cox model) analyses to determine the relationship of survival rate and prognostic factors including age, sex, histology, B symptom and clinical stage. All cases were histologically classified according to the criteria of the working formulation and were staged according to the Ann Arbor classification. Non-Hodgkin's lymphoma occurred roughly 9 times as frequently as Hodgkin's disease. The lymph nodes of the neck and inguinal regions were noted to be the most common sites of involvement. However, extranodal lymphomas originated most frequently from the stomach. For the patients with non-Hodgkin's lymphoma, the proportions of low grade, intermediate grade, and high grade were 10.7%, 59.1% and 20.7%, respectively. The remaining 9.5% of cases were unclassified (7.7%) and true histiocytic (1.8%). The most common subtype was diffuse large cell (33.7%). Lymphoblastic lymphoma was found to have a predilection for young male adults. Follicular lymphomas occurred mainly in mid-adult life. The patients with high grade lymphoma almost always presented the advanced stage. The median survival time (MST) of our series was 20 months, the 3-year survival rate was 43.3% and the 5-year survival rate was 30.40%. Statistical studies of both unifactorial (p less than 0.01) and multivariate regression (p less than 0.05) analyses showed that patients with an age greater than 60 years old, having B symptom, clinically advanced stage, or both histologically intermediate and high grade experienced a much poorer prognosis.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[Non-Hodgkin's lymphoma in adults: a clinico-pathologic study of 169 cases]. 198 22

The non-Hodgkin's lymphomas include a broad range of neoplasms derived from the T cells and B cells and their precursors in the lymphoid system. Although they are not among the most common cancers, the lymphomas have engendered a great deal of interest among researchers because of their interesting biology and responsiveness to therapy. The non-Hodgkin's lymphomas include at least ten major subtypes of diseases with different morphologic characteristics and clinical behavior. Based upon survival characteristics, it is convenient to divide the lymphomas into three broad categories, low grade, intermediate grade, and high grade. The low grade lymphomas usually arise in middle age or older individuals (median age, 55 years). They are derived from B cells and often have a follicular architectural pattern. They usually present with advanced stages of disease, often by virtue of bone marrow involvement. Nevertheless, patients are usually asymptomatic and may even have spontaneous regressions of disease. These lymphomas are responsive to a broad range of therapies including irradiation, single agent or multi-agent chemotherapy, or combined modality therapy. They are also affected by treatment with biologicals such as alpha interferon and monoclonal antibodies. Unfortunately, response to any of these therapies is often transient and relapse is common. The intermediate grade lymphomas include the common large cell lymphomas (follicular or diffuse) and diffuse mixed cell lymphoma. The lymphomas, together with the high grade immunoblastic lymphoma, are often grouped together for the development of management strategies. These lymphomas may be derived from B cells or T cells. They occur over a broader age range than the low grade lymphomas and they are much more aggressive in their natural behavior. Effective treatment programs have been developed for both limited and advanced clinical stages of disease. In limited disease, moderately intensive chemotherapy is often combined with involved field irradiation. In advanced stage disease, more aggressive combination chemotherapy programs are usually employed. From 40% to 80% of patients may be cured with these approaches, depending upon the initial extent of disease. Two types of high grade lymphoma-lymphoblastic and small noncleaved cell are particularly aggressive in their behavior. Lymphoblastic lymphoma is a T cell lymphoma that often arises in adolescent males and presents with a large mediastinal mass, marrow, and CNS involvement. It closely resembles acute lymphoblastic leukemia (ALL) and similarly intensive chemotherapy programs as are utilized in ALL may be successful in its management.(ABSTRACT TRUNCATED AT 400 WORDS)
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PMID:The non-Hodgkin's lymphomas: pathology, staging, treatment. 312 8

The authors describe a case of lymphoblastic lymphoma of the renal lodge complicated by hemorrhagic pericarditis, cardiac tamponade and quickly evolved in an unfavourable way. Lymphoblastic lymphoma is classified into lymphocytic lymphomas (or non-Hodgkin) with a higher grade of malignancy. These lymphomas have, in 40% of cases, an initially extra-lymph node localization: among these, the renal or perirenal localization is not very frequent. The concomitant presence of a pericarditis of hemorrhagic type is also less frequent. Unlike Hodgkin's lymphomas, lymphocytic lymphomas are frequently in an advanced stage at the moment of diagnosis, and their evolution is of acute-subacute, often fatal type. The case report is about a 70 year old male, who arrived at the clinical investigation for the subjective presence of asthenia, dyspnea, tachycardia and the objective evidence of jugular turgor, hepatomegaly and distal edemas, hypophonesis of right lung basis, according to a clinical picture of systemic venous congestion which instrumental examinations confirm to be of pericardial origin. The abdominal echographic examination showed an occupation of the perirenal space, so the CAT characterized as a 25 cm long formation (from the renal cavity to pelvis), with a dislocation of close structures. Unfortunately, the clinical picture had a quick evolution towards the exitus for cardiac tamponade, only permitting us a bioptic examination for the diagnosis of the case.
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PMID:[Lymphoblastic lymphoma of the renal cavity associated with hemorrhagic pericarditis. Description of a case]. 785 60

Pediatric non-Hodgkin's lymphomas (NHLs) comprise an important subset of childhood malignancies with characteristic clinical, histologic, cytogenetic, and immunologic findings. Lymphoblastic lymphoma, small noncleaved cell lymphoma, and large cell lymphomas comprise the vast majority of childhood NHLs. Proper distinction of these subsets of NHL has important therapeutic and prognostic implications for the patient.
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PMID:Classification of non-Hodgkin's lymphomas in children. 857 25

Lymphoblastic lymphoma (LBL) is a neoplasm of lymphoid precursors presenting usually as acute leukemia with bone marrow and peripheral blood involvement. Primary cutaneous involvement of LBL with a pre-B phenotype has to be considered an extremely uncommon occurrence, accounting for less than 1% of all non-Hodgkin lymphomas. A child with an LBL involving a single cutaneous manifestation of 6 months duration is presented. At the time of presentation, the lesion consisted of a rapidly enlarging deeply infiltrated tumor on the upper arm. Immunophenotypic analysis performed an paraffin-embedded and frozen tissue sections revealed 2 pre-B phenotype of the tumor cells. Similar results were obtained from lymph node and bone marrow biopsy specimens. After 26 months of polychemotherapy, the patient is currently in complete remission. We wish to add this case to the current literature of LBL with cutaneous involvement, emphasizing the importance of a correct diagnosis and the excellent response to the therapeutic regimen.
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PMID:Lymphoblastic lymphoma of the pre-B phenotype with cutaneous presentation. 940 85

Lymphoblastic lymphoma (non-Hodgkin lymphoma) is a highly uncommon but serious condition during pregnancy. With multidisciplinary management (obstetrics, pediatrics, hematology and anesthesia), outcome is generally good for both mother and child. Chemotherapy must be initiated rapidly, during pregnancy. Consequences depend on the stage of the disease, its progressive nature and the of pregnancy. During the first trimester, medical termination should be proposed in order to initiate chemotherapy cannot be started until the second trimester using alkaloids. Chemotherapy has little effect on the fetus during the second trimester. During the trimester, extraction should be discussed as soon as the fetal maturity is sufficient.
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PMID:[Management of lymphoblastic lymphomas during pregnancy]. 1067 30

Lymphoblastic lymphoma (LBL) is one of the most frequent occurring pediatric non-Hodgkin lymphomas. In the WHO classification scheme, pediatric LBL is considered to be the same disease entity as pediatric acute lymphoblastic leukemia (ALL). However, it is unclear whether the genetic basis of pediatric LBL development is similar to that of pediatric ALL. We performed genome-wide analyses of copy number aberrations in 12 T-LBL and 7 precursor B-cell LBL pediatric cases using high-resolution SNP-based array CGH. Similar to what previously has been found in T-ALL, T-LBL exhibited recurrent deletions of the CDKN2A locus, occurring in 92% of the cases. Additionally, we detected deletions of RB1 (16%), duplications of MYB (16%), and an amplification of ABL1 in one case. These results show that, similar to T-ALL, the genomic alterations in T-LBL predominantly target genes involved in cell cycle progression. The majority of precursor B-cell LBL was characterized by high-hyperdiploidy (71%), and showed high resemblance with high-hyperdiploid precursor B-cell ALL. Taken together, our data suggest that pediatric LBL and ALL exhibit similar genomic abnormalities within confined immunophenotypic and cytogenetic subgroups, but that the representations of these subgroups differs between the two entities.
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PMID:High-resolution genomic profiling of pediatric lymphoblastic lymphomas reveals subtle differences with pediatric acute lymphoblastic leukemias in the B-lineage. 1938 5


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