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Abstract
We studied bone marrow angiogenesis in different stages of multiple myeloma according to the Durie and Salmon classification and its correlations with other disease characteristics. Sixty-five immunohistochemical CD34-stained, paraffin-embedded bone marrow biopsies of multiple myeloma patients and 12 controls were studied. The mean number of microvessels per area in each sample was determined as the microvessel density (MVD). In addition, plasma cell infiltration of the bone marrow, serum beta2-microglobulin, immunoglobulin levels, C-reactive protein, and serum calcium concentration were measured in 22 patients with stage I multiple myeloma and in 43 patients in stage II-III. In myeloma patients, the bone marrow MVD was significantly higher than in controls (P<0.001). In 43 patients with stage II-III multiple myeloma, MVD was significantly higher than in 22 patients with stage I (median MVD 46 and 21 vessels/mm(2), respectively, P=0.005). Additionally, in stage II-III the bone marrow MVD correlated positively with the bone marrow plasma cell infiltration (r=0.55, P<0.001) and the serum beta2-microglobulin level (r=0.53, P<0.001), while in stage I patients no correlation could be found. Angiogenesis is significantly increased in stage II-III myeloma in comparison to stage I. In stages II-III, bone marrow angiogenesis is correlated with plasma cell infiltration and serum beta2-microglobulin levels.
Published Version
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