Figure 3a. (a) Photograph shows a gross specimen with a bimorphic pattern consisting of areas of lobulated gray-white hyaline cartilage adjacent to regions of yellow-brown soft tumor, as well as a soft-tissue mass. (b, c) Photomicrographs (hematoxylin-eosin stain) also show the tumor with a bimorphic pattern. The low-grade hyaline cartilage component demonstrates the typical features of ordinary chondrosarcoma, with sheetlike regions of malignant high-grade spindle cells (arrow) immediately adjacent to the well-differentiated chondrosarcoma (arrowhead).