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Chondrosarcoma is the most common malignant bone tumor in the foot in some reported series
Chondrosarcoma is the most common malignant bone tumor in the foot in some reported series. Patients with multiple cartilage lesions, such as Ollier's disease, or multiple enchondromas are at increased risk. This tumor has several subtypes, including clear cell chondrosarcoma, and mesenchymal chondrosarcoma, which can occur in bone (images 1, 2, 3, 4) in the soft tissues (image 5), where it presents as as an innocent bump. Most chondrosarcomas are low grade, but dedifferentiated chondrosarcoma can occur in the setting of a longstanding benign cartilage lesion such as enchondroma.
The lesion presents as a slow growing mass with mild pain.