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  • Title: IgD plasma cell neoplasia: clinical manifestations and characteristic features.
    Author: Pruzanski W, Rother I.
    Journal: Can Med Assoc J; 1970 May 23; 102(10):1061-5. PubMed ID: 5000054.
    Abstract:
    Three patients, one with plasma cell leukemia and clinically asymptomatic hypernephroma and meningioma, and two others with multiple myeloma, had M-components of IgD/lambda type. In the first case, IgD globulin was found in the serum, ascitic and pleural fluids. Including our patients, 50 cases of IgD myeloma have been reported in the literature. A review of this group showed some significant differences from the other classes of multiple myeloma. IgD myeloma seems to involve a larger proportion of younger people, 66% being less than 59 years of age. The involvement of internal organs and renal damage were more frequent in IgD myeloma than in other classes. Serum total protein was frequently not increased, the relative concentration of M-component was often low and in 12% there was no spike in electrophoresis. The diagnosis therefore was sometimes difficult. In a quarter of the cases Bence Jones proteinemia was found and in 15% there were multiple spikes, both these manifestations being rare in IgG or IgA classes of myeloma. In 89%, IgD globulin had lambda type light chain, clearly contrasting with the figure of approximately 30% in other classes. Bence Jones protein was found in the urine in 91%. The survival time seemed to be shorter than in other myelomas.
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