Symptoms are seen at the area of tumor

• Pain that gets worse over time and with physical activity
• Swelling, stiffness, and tenderness at the affected area
• Weak bones that fracture easily

• The exact cause is not known. The possible causes include:
• Certain genetic mutations confer a predisposition
• It may be caused due to transformation of benign cartilage lesions into cancers
• It may also occur following radiotherapy for other cancers
• Patients of diseases such as the following are at increased risk of developing chondrosarcoma:
• Ollier's disease
• Multiple hereditary exostoses (MHE, a.k.a., osteochondromatoses)
• Maffucci syndrome
• Paget’s disease
• Wilms’ tumor

If untreated for a prolonged period it may lead to

• Periosteal reaction: formation of a new bone in response to injury or other stimuli
• Loss of a limb (treatment may require amputation)