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• W186205669 abstract "Abstract This pathologic study is based on 9 autopsies and many biopsies in cases of infectious mononucleosis. The gross changes were almost exclusively confined to enlargement of lymphoid tissues, especially the spleen. Nasopharyngeal lymphoid hyperplasia was constant, in one instance suggesting tumor. Other tissues presented no significant gross features related to the primary disease except for (1) rather consistent enlargement of the liver, (2) infrequent icterus, and (3) occasional cutaneous rash. Histologic observations revealed more or less generalized lesions resembling those of certain known virus diseases, notably perivascular aggregates of normal and abnormal lymphocytes. Reaction of this type inconstantly involved all tissues studied except the bone marrow; here lymphocytes were virtually absent in sections, but were present in aspirated marrow because of dilution with peripheral blood. More specific changes were invariably noted in lymphoid tissues. The abnormal lymphocyte characteristic of the disease could be identified in thin, lightly stained sections. Lymph node reactions varied from a predominantly follicular hyperplasia to a blurred pattern simulating a malignant lymphoma; the latter was due to a lymphocytic and reticulo-endothelial proliferation in the medullary cords. The spleen displayed a lymphocytic infiltration in the thinned capsule and trabeculae, frequently dissolving the latter and rendering the organ liable to rupture. The pattern was partially effaced in most instances and the follicles widely spaced. Blood sinuses contained considerable numbers of normal and abnormal lymphocytes, and accumulations of these cells constantly cuffed intratrabecular arteries and lay beneath the intima of veins. Tonsils displayed ulceration and necrosis in several cases, and the lymphocytic proliferation closely resembled malignant tumor in a tonsil that enlarged rapidly. A pneumonic exudate in 1 case was almost exclusively of round cell type, while in another the pneumonia was of the usual lobular type with a neutrophilic exudate. Small myocardial infiltrates which we noted probably explain the electrocardiographic changes described in infectious mononucleosis. Other findings of particular interest were the periportal lymphoid collars in the liver which sometimes attained the proportions seen in leukemia, and the presence of meningo-encephalitis in 4 of the 6 brains examined. We believe that the majority of cells in the lymphocytic infiltrates of connective tissues and the perivascular collars are metaplastic rather than inwandering, i.e., that they are formed in situ and stem from cells of the reticulo-endothelial system." @default.
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• W186205669 date "1948-08-01" @default.
• W186205669 modified "2023-09-30" @default.
• W186205669 title "THE PATHOLOGY OF INFECTIOUS MONONUCLEOSIS" @default.
• W186205669 doi "https://doi.org/10.1182/blood.v3.8.830.830" @default.
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