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G Frizzera

Publications and source records attributed to G Frizzera.

At least 109 records · Page 6Linked to original sources
PubMed1982

Bone marrow and blood involvement by lymphoma in relationship to the Lukes--Collins classification.

The incidence, pattern, extent, and morphology of bone marrow involvement in 176 cases of non-Hodgkin's lymphoma (NHL) were studied in relationship to the Lukes--Collins classification. Ninety percent of the cases were B-cell lymphomas; 10% were T-cell lymphomas. In 53% of cases there was bone marrow involvement by lymphoma at diagnosis. Marrow involvement was most frequently found in the small lymphocyte (B), small cleaved follicular center cell (FCC), and convoluted lymphocyte lymphomas. Frequently, the extent of bone marrow biopsy replacement by lymphoma was less than 30%; the pattern of infiltration was predominantly focal (70%). Cytologic agreement between lymph node and bone marrow specimens was always present in small lymphocyte (B), small noncleaved FCC, convoluted lymphocyte, and lymphoepithelioid cell lymphomas. Cytologic diversity between lymph node and marrow was noted in 20% of small cleaved FCC, 40% (2/5) of large cleaved FCC, and 38% (3/8) of large noncleaved FCC lymphomas. In 79% of all involved cases, both bone marrow biopsy sections and aspirate smears were diagnostic of NHL; only biopsy sections were positive in 18%, and only smears were positive in 3%. The Lukes--Collins classification predicts a high incidence of bone marrow involvement for small lymphocyte (B), small cleaved FCC, and convoluted lymphocyte lymphomas.

Adolescent↗
PubMed1982

Successful transplantation of a human leukemia cell line into nude mice: conditions optimizing graft acceptance.

Conditions were determined for successful subcutaneous tumor development of MOLT-4 human T-cell leukemia cells in BALB/c nude (nu/nu) female mice. MOLT-4 cells injected alone at one site resulted in tumors in none of 21 mice, whereas MOLT-4 cells injected with X-irradiated human fibrosarcoma cells (HT-1080) at another site resulted in tumors in 5 of 21 mice. When X-irradiated three times with 200 rad over a 3-week period and then inoculated with MOLT-4 cells and X-irradiated HT-1080 cells, 19 of 25 mice developed tumors, which indicated that a combination of X-irradiation of the recipients and inoculation of an admixture of the leukemia cells with X-irradiated fibrosarcoma cells markedly increases tumor incidence. The cells growing in the tumors had the characteristics of MOLT-4, as assessed by marker studies and histology.

Animals↗
PubMed1981

Wiskott-Aldrich syndrome: histopathologic findings in the lymph nodes and spleens of 15 patients.

Seventeen lymph nodes and 13 spleens from 15 patients with the Wiskott-Aldrich syndrome were examined histologically. The material included both biopsy and autopsy specimens. Consistent findings included depletion of small lymphocytes from T cell areas (all cases), prominence of the reticulum cell stroma (all cases), the presence of atypical plasma cells with and without plasmacytosis (16 lymph nodes and 11 spleens), and extramedullary hematopoiesis (13 lymph nodes and 9 spleens). Less frequent features noted were tissue eosinophilia, hemophagocytosis, focal fibrosis, and progressive depletion of germinal centers. One case with a unique abundance of transformed lymphocytes is described.

Child↗
PubMed1981

Clinical spectrum of lymphoproliferative disorders in renal transplant recipients and evidence for the role of Epstein-Barr virus.

Six renal transplant recipients with abnormal lymphoproliferative disorders were studied in an attempt to define their clinical features and the role of Epstein-Barr virus (EBV) in their pathogenesis. Patients were either teenage (three) or in the sixth decade (three). The younger patients presented an average of 3 months after transplantation with fever, sore throat, and lymphadenopathy; had been markedly immunosuppressed; frequently had preceding or concomitant cytomegalovirus infections; and two of three had a rapidly fatal course. The older patients presented an average of 5 years after transplantation while on maintenance immunosuppressive drugs; in two of three cases with an oropharyngeal tumor; and had a more indolent, but frequently fatal, clinical course. The most frequent sites of biopsy-proven involvement in these patients were lymph nodes (three), the oropharynx (three), liver (three), bone marrow (three), transplanted kidney (three), colon (two), and central nervous system (two). EBV-specific antibody titers including anti-viral capsid antigen IgG, anti-viral capsid antigen IgM, anti-early antigen, and anti-Epstein-Barr nuclear antigen were serially measured in all patients. Four patients demonstrated serological evidence of a primary (one) or reactivation (three) EBV infection. No patient had significant changes in anti-early antigen or anti-Epstein-Barr nuclear antigen titers. All three patients tested for oropharyngeal shedding of EBV were positive. A touch imprint of one tumor was stained for the presence of Epstein-Barr nuclear antigen, and a majority of cells were positive. EBV complementary RNA/DNA filter hybridization and/or viral DNA/DNA reassociation analysis performed on tumor biopsy specimens in five patients demonstrated multiple EBV genome equivalents per cell in all eight specimens tested. Clinical, pathological, serological, and molecular hybridization studies provide substantial evidence that EBV was the cause of these lymphoproliferative disorders occurring after renal transplantation. Impaired host defenses allow the EBV-transformed B-lymphocytes to escape normal control mechanisms. This impairment is invariable and influenced by many factors resulting in the observed spectrum of disease. Cytogenetic changes, however, may also be important.

Adolescent↗
PubMed1981

Polymorphic diffuse B-cell hyperplasias and lymphomas in renal transplant recipients.

The lymphoproliferative processes that developed in five renal transplant recipients were studied in an attempt to characterize and classify them morphologically. Nine surgical specimens, hematological material on all patients, and autopsy specimens from three patients were available. Studies performed included: conventional histopathology; evaluation of cell markers (immunoglobulins and sheep erythrocyte, complement, and Fc receptors) and cytoplasmic immunoglobulins (peroxidase-antiperoxidase technique); ultrastructural examination; and karyotype analysis. The lymphoid lesions in our patients shared marked cytological polymorphism (small and large cells, of both follicular center and "medullary" type) and polyclonal B-cell features, which indicated a common reactive nonneoplastic origin. However, other features, such as morphological atypia of the immunoblasts, extensive necrosis, chromosomal aberrations, and an incipient monoclonal component suggested the development of lymphoma in some of these lesions. In contradistinction, the abundance of typical immunoblasts was a feature that seemed to correlate with the clinical activity of the disease rather than with the biological malignancy. The multiplicity of B-cell types and the presence of a follicular center cell component with diffuse distribution, as well as the extensive necrosis in the malignant forms, seem to differentiate morphologically the lymphoproliferative processes arising in transplant recipients from both the hyperplasias and the lymphomas developing in immunologically normal hosts. For the former, we propose the terms of "polymorphic diffuse B-cell hyperplasias" and "polymorphic B-cell lymphomas."

Adolescent↗
PubMed1980

Lymphoreticular disorders in primary immunodeficiencies: new findings based on an up-to-date histologic classification of 35 cases.

A histologic review was undertaken of 35 lymphoreticular disorders that developed in primary immuno-deficiency patients from the Immunodeficiency Cancer Registry. Twenty-one (60%) of the lesions were non-Hodgkin's lymphomas: these included eight B-immunoblastic sarcomas. Eight (23%) of the lesions were Hodgkin's disease, with a high frequency of lymphocytic depletion type in an unusually young age group. Three lesions (8.5%) represented abnormal proliferative processes, which could not be definitely categorized as either benign or malignant. There were only two acute lymphoblastic leukemias (6%). Differences were found between lymphomas arising in Wiskott-Aldrich syndrome and those occurring in ataxia-telangiectasia; this suggests that different pathogenetic mechanisms might operate in their development. The lymphomas in Wiskott-Aldrich syndrome were all of non-Hodgkin's type, predominantly B-immunoblastic sarcomas, and presented as localized extranodal infiltrates. The lymphomas in ataxia-telangiectasia were either Hodgkin's disease, mostly of lymphocytic depletion type, or non-Hodgkin's lymphomas of the histologic subtypes associated with 14q translocations.

Adolescent↗
PubMed1980

In-vitro glucocorticoid studies for predicting response to glucocorticoid therapy in adults with malignant lymphoma.

Neoplastic tissues from 28 adults with malignant lymphoma were examined for glucocorticoid receptors and in-vitro sensitivity to glucocorticoids. The patients were then treated with desamethasone for 5--14 days. 13 patients achieved at least a partial remission, and 15 had no significant tumour response. Lymphoma cells from patients who responded had more glucocorticoid-receptor sites per cell and greater in-vitro sensitivity as measured by glucocorticoid inhibition of incorporation of leucine and uridine than did tumour cells from non-responders. Study of tumour glucocorticoid receptors and glucocorticoid sensitivity in vitro may allow selection of those patients with lymphoma who should receive glucocorticoids as part of combination chemotherapy.

Adolescent↗
PubMed1980

Curative radiotherapy for localized diffuse histiocytic lymphoma.

Ten newly diagnosed patients, with localized diffuse histiocytic lymphoma classified according to the Lukes-Collins classification, were evaluated for response to treatment with extended-field radiation. All classified tumors were of follicular center cell type (four large cleaved, four large noncleaved, and one small noncleaved). There were nine patients with stage I disease and one with stage II disease. The patient with stage II disease had only two sites of involvement. The disease was nodal in six patients and extranodal in four. All patients are alive without evidence of disease recurrence from 19 to 102 months since diagnosis (median survival, 58 + months). No differences were found in response or survival rates between histologic categories. No significant immediate or long-term complications have occurred. These results suggest that radiotherapy alone is curative for localized diffuse histiocytic lymphoma and may be superior to recently advocated chemotherapeutic approaches.

Adult↗
PubMed1979

Clinical utility of lymphocyte surface markers combined with the Lukes-Collins histologic classification in adult lymphoma.

To determine whether analysis of lymphocyte surface markers adds clinically useful information to the Lukes-Collins classification of lymphomas, tumors from 107 adults were histologically classified and studied for surface markers. Ninety-six cases were histologically classified as Lukes-Collins B-cell lymphomas; 87 showed B and one showed T surface markers, whereas eight had neither marker. Eleven lymphomas were histologically T-cell tumors; four of the 11 showed T surface markers, and seven had neither marker. Both the Lukes-Collins classification and surface markers identified patient groups with different clinical characteristics, chemotherapeutic responsiveness and survival. However, by combining surface markers and histologic features, additional important therapeutic and prognostic information was obtained. In each histologic class, patients whose lymphomas failed to express immunologically the histologically predicted marker had fewer responses to chemotherapy and shorter survivals than patients whose lymphomas expressed the predicted marker. Our data suggest that the analysis of surface markers in combination with the Lukes-Collins classification identifies many patients who respond poorly to current therapy and who thus require new therapeutic approaches.

Aged↗
PubMed1979

Predictability of immunologic phenotype of malignant lymphomas by conventional morphology: a study of 60 cases.

In order to test the immunologic validity of the Lukes-Collins (L-C) classification of the non-Hodgkin's lymphomas (ML), 60 ML in adult patients were studied and their B- or T-cell nature was predicted on a morphologic basis, without knowledge of the clinical history or the results of surface marker (SM) studies (SIg, C', Fc and E-rosettes), which were performed on cell suspensions and cryostat sections from the same specimens used for histology. There was a good correlation between morphologic types and SM (97% for the nodular ML, 81% for the diffuse). The predictions were not confirmed in 6 instances: one nodular ML typed as T; one convoluted lymphocytic ML typed as histiocytic; and four diffuse ML, predicted to be of B-type, bore no detectable SM ("Null" ML). It is concluded that the L-C morphologic criteria do allow in most cases the recognition of the B- or T-cell nature of ML, but cannot detect variations of the SM pattern which seem to affect the clinical behavior of these neoplasias. Thus, while the L-C classification seems immunologically sound, its clinical relevance still needs to be demonstrated.

Adult↗
PubMed1979

Follicular (nodular) lymphoma in childhood: a rare clinical-pathological entity. Report of eight cases from four cancer centers.

Eight cases of follicular lymphoma (FL) were found amount 318 children with non-Hodgkin's lymphoma seen in two decades in four large institutions (overall incidence: 2.5%). The children's ages ranged from 3 to 13 years (median 8). Four patients presented with localized peripheral lymphadenopathy, two with tumors of the digestive tract, two with disseminated disease. Five were tentatively classified as stage I or II and 3 as stage IV. The existence of other diseases responsible for lymphadenopathy could satisfactorily be exclued. All patients are alive after follow-up periods of 1 to 14 years from diagnosis (median 4). Morphologically, 5 lymphomas were mixed and 3 histiocytic. The growth pattern was "expansile" in the younger patients (3 to 9 years), and "infiltrative," as in the adult disease, in the three older children (11 to 13 years). The histiocytic cytology correlated with stage IV disease. FL in children appears to be different from both its adult counterpart and the diffuse childhood lymphomas. Differences with the former include the absence of tumors of poorly differentiated lymphocytic type, the higher frequency of stage I-II disease and the better prognosis. This last feature, as well as the higher frequency of peripheral node involvement and the absence of leukemic conversion or CNS disease, differentiates the follicular from the diffuse childhood lymphomas.

Adolescent↗
PubMed1979

Incidence and patterns of bone marrow and blood involvement by lymphoma in relationship to the Lukes-Collins classification.

Pretreatment lymph nodes, bone marrow, and blood were examined in 176 cases of non-Hodgkin's lymphoma. By the criteria of the Lukes and Collins functional--morphological classification, 158 (90%) were B-cell lymphomas and 17 (10%) were T-cell lymphomas. Bone marrow involvement was present in 53% of cases: 51% of B-cell types and 65% of T-cell types. Marrow involvement was most frequent in small lymphocyte (B) (89%), convoluted lymphocyte (60%), and small cleaved follicular center cell (FCC) lymphomas (55%). The pattern of bone marrow involvement was most frequently focal paratrabecular in B-cell lymphomas and diffuse in T-cell lymphomas. Blood involvement was present in 50% of cases with bone marrow lymphoma and generally reflected extensive bone marrow disease. There was a higher incidence of both bone marrow and blood involvement in pediatric patients than in adults.

Adolescent↗