Figure 2

Microscopic findings of the tumor-1. (A) The tumor was composed predominantly of spindle-shaped cells (arrowheads) arranged in a typical palisading pattern that was compatible with schwannoma (hematoxylin and eosin; x100). Microscopic findings of the tumor-2 (B) The tumor (t) was found to have destroyed the cortex of the sternum (arrows) and proceeded forward to the bone marrow (b) (hematoxylin and eosin; x40).