in 16 cases of waldenstrom 's macroglobulinaemia the following findings were sufficiently frequent to justify a provisional diagnosis : a modestly enlarged node with lymphocytic infiltration through the capsule into the adjacent connective tissue , retention of the sinus and medullary reticulin pattern , few or no peripheral follicles , sinuses marked out by pale histiocytes , scanty mitoses , numerous plasma cells , and dark staining of plasma in blood vessels .
C0024419
waldenstrom 's macroglobulinaemia
C0032112
plasma cells