836893.fig.007a
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836893.fig.007b
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Figure 7: Microscopic findings of the pulmonary vasculature affected by plasma cell myeloma. (a) The pulmonary artery showing marked plasma cell proliferation. The adventitia is predominantly affected (hematoxylin-eosin, original magnification ). (b) A cross-section of the arteriole indicating plasma cell proliferation. The vascular wall is thickened and the lumen becomes narrow (elastica Masson, original magnification ).