FIG 6.

Representative microphotographs of type II foreign material found in patient clot tissue. A and B, Multiple pieces of foreign material embedded within clot tissue (arrows). They appear to be light gray or dark gray; thin or attenuated in texture (H&E, original magnification ×400). C and D, Foreign material pieces embedded within clot tissue, which appear to be denser and solid in texture (arrows), compared with that in A and B. They are wormlike or irregular in shape, gray or light gray (H&E, original magnification oil lens ×100). E–G, Cluster of the foreign material pieces, as a pool surrounded with clot tissue (H&E, original magnification ×200 [E], ×400 [F and G]).