Central chondrosarcoma may present as osteolysis with vague borders, with or without interruption of cortical bone. Areas of x-ray opacity may be present within the tumor due to the tendency of the cartilage to calcify and ossify, and calcification often occurs around cartilage lobules without certain structure. It is characterized by irregular foggy granules, nodules or rings that are impervious to X-rays. How is cardiac chondrosarcoma examined? X-rays show an osteolytic lesion in the bone, which may have calcium salt deposits. Most tumors grow slowly, while a few grow rapidly. In the epiphysis-epiphysis, the tumor is eccentric; in the diaphysis, it is located in the center of the diaphysis. Due to the bony crest of the tumor wall, the tumor may produce a vesicular or breadcrumb-like appearance. If the calcification is dense, the tumor may have a metallic appearance that is impervious to x-ray. If the tumor infiltrates the medullary cavity of cancellous bone without destroying the trabeculae, the calcium deposits and reactive bone proliferation may appear as a spongy bone with no X-ray uniformity. If the tumor infiltrates the cancellous bone without destroying the trabeculae and without calcification, the tumor portion of the bone may not be visualized. Well-differentiated central chondrosarcoma has more calcification, while grade III central chondrosarcoma and antidifferentiated central chondrosarcoma have less calcification and more mucinous areas. The cortical bone can be thin and scalloped internally, with interruptions in some areas sometimes due to slow expansion of the tumor, the cortical bone undergoes hyperplasia and can appear thickened. This thickened cortical bone presents quite typically, indicating that it has been infiltrated by the tumor. Central chondrosarcoma tends to expand to areas of less resistance, such as the medullary cavity of the bone stem. In almost half of the cases, radiographic images show that the tumor invades 1/3, 1/2, or more of the entire long bone, but in the early stages of the tumor, the images may not show this. This feature is important otherwise the surgical plan may be inappropriate, the resection margin may be inadequate, and the tumor may recur in the residual limb after stem resection or amputation. In more aggressive cases, central chondrosarcoma can have extensive cortical disruption early on, large soft tissue masses, and insignificant calcification in the invading soft tissue. The infiltrated periosteum may react by producing a thin, slightly radiopaque band perpendicular to the cortex, but the typical “toothbrush” image and Codman’s angle seen in osteosarcoma are never seen.