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A. Histologically, the tumor is composed of loose, myxoid tissue with numerous stellate and spindled fibroblasts. There was minimal cytoatypia, with small bland nuclei and no discernable mitotic activity. There was focal acute hemorrhage, but no necrosis was seen. B. The stroma was superficially infiltrated between bony spicules, eliciting reactive changes including osteoblastic rimming.
