[Bone marrow necrosis disclosing multiple myeloma of bone].
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Adult↗
Biomedical subjects
C Haioun
Publications and source records attributed to C Haioun.
Immunoblastic lymphoma involving the bone marrow in a patient with alpha chain disease. Clinical and immunoelectron microscopic study.
A patient is reported who had disseminated immunoblastic proliferation that emerged during the course of alpha chain disease. This proliferation was characterized by overt marrow invasion together with osseous and neurologic manifestations. On immunoelectron microscopic study, the malignant immunoblasts displayed varying degrees of cytoplasmic maturation and constituted a morphologic spectrum of alpha-chain-synthesizing cells, ranging from immature blasts without endoplasmic reticulum development to relatively mature plasmablasts; alpha chain was not expressed at the surface of these cells. The general features of the overt malignant stage of alpha chain disease are reviewed in reference to this unusual case. The implications of the cellular findings are discussed with regard to the maturation stage of malignant immunoblasts.
Adult↗
Diagnostic yield of bronchoalveolar lavage in pneumonitis occurring after allogeneic bone marrow transplantation.
Fifty-two bronchoalveolar lavages (BAL) were performed in order to investigate 46 episodes of pneumonitis that occurred after allogeneic bone-marrow transplantation. No complications have been attributed to this procedure. A specific etiologic diagnosis was obtained in 24 of 46 episodes (52%) by 26 of 52 BAL (50%). Cytomegalovirus (CMV), diagnosed by the presence of typical inclusions, was the pathogen most frequently identified by BAL (13 of 46 episodes) and was associated with other causes of pneumonia in 4 patients. The other causes of pneumonitis diagnosed by BAL were: giant-cell pneumonia: 1, aspergillosis alone: 3, Pneumocystis carinii: 1, Hemophilus influenzae: 3, isolated pulmonary hemorrhage: 3. One false negative (aspergillosis, n = 1) was diagnosed at autopsy. The overall mortality rate of these episodes was 24%. Thus, BAL appears to be a rapid and reproducible diagnostic method for monitoring pneumonitis in grafted patients, particularly CMV pneumonitis, and may avoid the need for surgical biopsy.
Adolescent↗
Peripheral T-cell lymphoma presenting as predominant liver disease: a report of three cases.
Three cases of a peculiar form of peripheral T-cell lymphoma presenting as predominant hepatic disease with splenomegaly are reported. The three patients had marked liver enlargement without lymphadenopathy; white blood cell count was normal, and modifications of hepatic tests were mild. In the three cases, the diagnosis of the lymphoma was mainly based on the results of hepatic morphological changes. Liver involvement was histologically characterized by a predominantly sinusoidal infiltration by tumor cells in the three cases, associated with perisinusoidal fibrosis in two of them; portal infiltration was noted in two patients. Immunopathological study showed that tumor cells were T-lymphoid cells that were different from normal T-lymphocytes by the lack of expression of one T-cell membrane antigen, i.e., Leu-1. These findings suggest that a distinct clinical, pathological and immunopathological entity might be individualized within the large group of T-cell lymphomas.
Adult↗