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Query: UMLS:C0023418 (leukemia)
 93,477 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The clinical, morphological and immunological findings in nine cases of relapsing lymphocyte predominance Hodgkin's disease (LPHD) are examined. Six patients had initial biopsies demonstrating nodular lymphocytic and/or histiocytic (L&H) LPHD; Leu-M1 was not expressed by any of the atypical cells in these cases. All six demonstrated one or more recurrences of nodular L & H LPHD; four are currently free of disease, one died of non-Hodgkin's lymphoma and another died of leukaemia. Two patients had initial biopsies demonstrating diffuse LPHD, with only rare multilobated atypical cells (L & H variants). Both patients had recurrences interpreted as mixed cellularity Hodgkin's disease, 10 and 15 years after initial therapy and both died with lymphocyte depleted Hodgkin's disease. The atypical cells in the initial biopsies and in subsequent recurrences failed to express Leu-M1, but did express leukocyte common antigen. The initial biopsy from the final patient was histologically interpreted as focal involvement by LPHD, but interfollicular Hodgkin's disease was considered after the Leu-M1 stain revealed additional atypical cells. The disease relapsed and the patient died with typical nodular sclerosing Hodgkin's disease. The pattern of the relapses supports the concept that the histological entity of LPHD may include several distinct clinicopathological subgroups.
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PMID:Lymphocyte predominance Hodgkin's disease: a reappraisal based upon histological and immunophenotypical findings in relapsing cases. 369 45

This report presents a case of common acute lymphoblastic leukaemia-lymphoma expressing low molecular weight cytokeratin but no leukocyte common antigen (CD45) in a 57-year-old man. The unusual morphology and clinical course together with the aberrant immunohistochemical results suggested a diagnosis of undifferentiated carcinoma. A detailed immunohistochemistry study on frozen and paraffin sections and molecular analysis prevented a diagnostic mistake.
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PMID:Common acute lymphoblastic leukaemia-lymphoma expressing cytokeratin: a case report. 752 53

In the present study, we explored the suitability of a new cell fixative (ORTHO PermeaFix, OPF) for the detection by flow cytometry of intracellular molecules while preserving the cell surface immunoreactivity, scatter features and morphology. The effect of OPF was investigated on whole blood of ten normal donors, and on separated blasts of 17 leukemic patients. OPF fixation for 45 min to 24 h maintained the morphology of lymphoid cells with minimal cellular distortion and scatter changes, and only slightly modified cell surface immunoreactivity. For at least 1 week following fixation, the cells were still suitable for immunostaining with monoclonal antibodies that recognize the main lymphoid populations. These included CD3, CD4 and CD8 for T-cell subsets, CD19 and CD16 for B lymphocytes and NK cells, and CD45 for leukocyte common antigen (LCA). The OPF fixation of leukemic cells allowed the simultaneous detection of nuclear TdT in conjunction with membrane CD19, and with membrane and/or cytoplasmic CD22 in common-ALL, as well as with cytoplasmic CD3 in T-ALL cases. Our findings suggest that with the introduction of this new fixative into the routine laboratory service, a number of convenient and practical arrangements can be made which increase the efficiency of immunodiagnosis. Small laboratories with no inhouse flow-cytometric facilities can now accumulate OPF-treated whole blood samples for at least 3-4 days and send these to reference laboratories. In addition, the immunodiagnosis of acute leukemia is greatly facilitated by combination staining for membrane and intracellular antigens both at diagnosis and when the analysis of minority populations is warranted for detecting minimal disease.
Leukemia 1994 Apr
PMID:Detection of membrane and intracellular antigens by flow cytometry following ORTHO PermeaFix fixation. 784 23

A case of epithelial mesothelioma presenting as an axillary metastasis of unknown origin with anemone cells in a 33-year-old patient with pleural effusion is reported. The differential diagnosis included tumors that can be composed of cells with anemone shape (malignant lymphoma, leukemia, malignant melanoma, carcinoma, and mesothelioma). Tumor cells in the present case were positive for cytokeratins (Cam 5.2 and AE1/3) as well as vimentin antibodies and were consistently negative for carcinoembryonic antigen, Leu-M1, leukocyte common antigen, pan-B-cell and pan-T-cell antigen, Ber-H2, S-100 protein, HMB-45, and epithelial membrane antigen antibodies. On electron microscopy, the most remarkable features were the presence of abundant, long, slender microvilli, the lack of well-developed intercellular junctions, and only occasional tight junctions in some of the tumor cells. A pleural needle biopsy confirmed the pleural origin of the proliferation. The patient refused treatment and died 3 years after diagnosis.
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PMID:Pleural mesothelioma presenting as an axillary lymph node metastasis with anemone cell appearance. 819 42

Engraftment of human acute leukemia cells in immunocompromised (SCID) mice has resulted in in vivo models for exploration of human tumor biology. Attempts at engraftment of chronic leukemia cells have been generally unsuccessful. We have engrafted cells from three human chronic leukemias in SCID mice. Cell populations were from two patients with chronic lymphocytic leukemia (CLL) and either increased proolymphocytes (CLL-Pro; patient 1), or prolymphocytic transformation (PLL; patient 2) and from a third patient with newly diagnosed T cell CLL. Both fresh and cryopreserved cells were used and were injected intravenously, intraperitoneally, or both, after conditioning with cyclophosphamide. In addition, cells derived from a mouse spleen engrafted with human leukemia were passaged into another mouse. The animals were observed daily for signs of disease or appearance of tumors and sacrificed when terminally ill. At intervals blood samples were obtained and analyzed for the presence of human cells or DNA. Human leukemic cells were demonstrated by polymerase chain reaction (PCR) analysis of the human DQalpha gene or positive staining for human leukocyte common antigen (LCA). The presence of Epstein-Barr virus (EBV)-positive cells was also investigated by PCR analysis. Disseminated tumors developed in most mice inoculated with cells from the first patient, and this was associated with shortened survival times. The methods of administration, use of fresh or frozen samples, or the size of the inoculum had no effect on the development of leukemia. Survival of the mouse receiving passaged cells was similar to mice inoculated with fresh cells. Extensive histologic, immunophenotypic, and DNA studies were performed on organs from mice engrafting with cells from patient 1. PCR analysis for EBV sequences was negative in the mice engrafting from all three cases. The successful engraftment of human CLL-Pro PLL and T cell CLL in SCID mice, and the reproducibility of this effect using frozen cells, will provide a model for exploration of disease biology and for investigations of new drugs or combinations that may be useful in the treatment of CLL.
Leukemia 1996 Feb
PMID:Engraftment of chronic prolymphocytic and T cell leukemia in SCID mice. 863 44

We report an autopsy case of preclinical primary central nervous system (CNS) lymphoma. The case was an 89-year-old female who died of rupture of a thoracic aortic aneurysm. No neurological abnormalities were found throughout our clinical observation. Serum anti-human T-cell leukemia virus type 1 and anti-human immunodeficiency virus were negative. Grossly, the brain was normal except for a small solid tumor, 6 by 6 by 2.5 mm, in the lateral ventricular wall at the left hippocampal fimbria, and multiple smaller disseminated nodules. Histological examination revealed multiple microscopic disseminated foci throughout the brain, including the cerebral subcortical white matter, basal nucleus, thalamus, brainstem and cerebellum. Histological classification is of lymphoblastic type non-Hodgkin's lymphoma of high-grade malignancy. Lymphoma cells are positive for leukocyte common antigen and L-26, indicating a B cell phenotype. In situ hybridization with Epstein-Barr viral probes is negative. It is concluded that this case may represent a relatively early preclinical stage of multifocal type of primary CNS lymphoma.
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PMID:Preclinical primary central nervous system lymphoma. 910 Nov 10

A continuing problem in cytology laboratories is the lack of adequate control material for immunocytochemical testing. Usual control procedures involve testing paraffin-embedded control materials along with the patient specimens. These control materials are fundamentally unlike cytologic preparations. We have developed a method to make control preparations for immunocytochemical analysis using cultured anaplastic cells with known antigenic features from commercial sources. Cell lines included melanoma, rhabdomyosarcoma, T-cell leukemia, and squamous-cell carcinoma. Modified Saccomano and acetone fixation coupled with the cytospin technique enabled good-quality preparations. Cell lines were tested with antibodies for HMB-45, actin, leukocyte common antigen (LCA) and cytokeratin, which avidin-biotin immunoperoxidase and diaminobenzidine (DAB) as chromogens. Our final preparations were easily interpretable with excellent morphologic preservation of cellular detail. Cultured cells provide a superior method for preparing almost unlimited numbers of control slides for immunocytochemistry for laboratories with access to a tissue culture facility.
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PMID:Immunocytochemistry controls using cell culture. 921 10

A 66-year-old woman who suffered from chronic glomerulonephritis had been undergoing hemodialysis for about 10 years. A reddish papule on her waist developed gradually into a nodule (1.9 x 1.4 cm). Histopathological findings showed that the tumor cells had oval to reniform nuclei; multinucleated neoplastic cells and erythrophagocytosis were also present. Immunohistochemical analyses revealed that the membranes of the tumor cells stained for Ber-H2 (Ki-1) and epithelial membrane antigen (EMA), Vimentin was partially positive, but keratin, S-100, chromogranin, leukocyte common antigen (LCA), UCHL-1, MT-1, L-26, MB-1 and C3D-1 were all negative. Anti-human T-cell leukemia virus-1 (HTLV-1) was also negative. No gene rearrangement of the T-cell receptors beta-, gamma- and delta-chain could be detected. From these results, we diagnosed cutaneous Ki-1 anaplastic large cell lymphoma (ALCL), but the origin could not be determined. The relationship between lymphoma and chronic renal failure and/or hemodialysis was far from clear.
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PMID:A case of cutaneous Ki-1 positive anaplastic large cell lymphoma in a hemodialysed patient. 957 83

A case of pre-leukemic granulocytic sarcoma (GS) of the uterus was found in a 73-year old woman. The diagnosis was suggested by vaginal cytology and the green color of the gross lesions, then confirmed by naphthol AS-D chloro acetate esterase stain and immunohistochemistry on fixed tissue with the anti-lysozyme, anti-myeloperoxidase, CD 43 and CD15 antibodies. At the time of GS discovery, the patient presented no evident leukemia but myelogram contained 20% of blast cells. She developed acute myeloid leukemia 2 months later. Cytogenetic study of the bone marrow revealed chromosome 21 trisomy. GS is frequently mistaken for malignant lymphoma since it expresses some of the leukocytic antigens (leukocyte common antigen, CD 45 RO (UCHL1), MB2). Therefore, the use of a large panel of antibodies, including anti-myeloperoxidase, anti-lysozyme and CD15, is recommended. Precise diagnosis is essential because all GS must be treated as acute myeloid leukemias.
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PMID:[Pre-leukemic granulocytic sarcoma of the uterus. Report of a case]. 970 44

The CD45RA and CD45RO isoforms of the leukocyte common antigen identify functionally distinct CD4+ T cell subsets: CD4+/CD45RA+ cells which represent a more 'naive' stage of T cell compartment and CD4+/CD45RO+ 'memory' cells. Phenotypic and functional abnormalities in T cell compartment have been frequently reported in patients with hairy cell leukemia (HCL) and, in more recent studies, a significant reduction in the absolute number of CD4+ lymphocytes bearing the CD45RO antigen has also been recorded. In our study we evaluated the CD45RA and CD45RO expression on CD4+ T cells by three-color staining in flow cytometry in 38 HCL patients, 19 untreated and 19 previously treated with 2-chlorodeoxyadenosine (2-CdA), administered at a daily dose of 0.1 mg/kg c.i. for 7 days. In HCL untreated patients, the proportion and the absolute number of CD4+/CD45RA+ and of CD4+/CD45RO+ T cell subsets were similar to normal controls. In contrast, HCL patients at 3-5 years by the end of treatment with 2-CdA, together with a reduction in the absolute number of CD4+ T cells, showed a persistent and significant decrease in the proportion and absolute number of CD4+/CD45RA+ cells as compared with both untreated HCL patients and normal controls (41 +/- 16% vs 57 +/- 14% and vs 65 +/- 7%) (P = 0.01 and 0.0001) and (0.201 +/- 0.137 x 10(9)/l vs 0.549 +/- 0.238 x 10(9)/l and vs 0.696 +/- 0.078 x 10(9)/l) (P = 0.00009 and P = 0.00001). In addition, together with the reduction of CD4+/CD45RA+ cells, we recorded a concomitant increase in the proportion of the CD4+/CD45RO+ cells as compared to untreated HCL patients and normal controls (62 +/- 16% vs 47 +/- 15% and vs 42 +/- 12%) (P = 0.08 and 0.02). These findings may suggest that CD4+/CD45RA+ cells are more sensitive than CD4+/CD45RO+ to the toxic effect of 2-CdA.
Leukemia 1999 Aug
PMID:Long-lasting decrease of CD4+/CD45RA+ T cells in HCL patients after 2-chlorodeoxyadenosine (2-CdA) treatment. 1045 Jul 54


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