text: The main cause of osteosarcoma is not well-known, yet. However, a number of risk factors have been identified in this regard. Osteosarcoma can involve any bone but it usually affects the extremities of long bones near metaphyseal growth plates. The most common sites include
  Femur 42% of cases ( the distal femur had around 75% of involvement).
  Tibia 19% of cases ( the proximal tibia had around 80% of involvement).
  Humerus 10% of cases  ( the proximal humerus had around 90% of involvement).
  Skull and jaw 8% of cases.
  Pelvis 8% of cases.
option_0: Osteosarcoma pathophysiology
option_1: Osteoma pathophysiology
option_2: Osteochondroma pathophysiology
option_3: Osteosarcoma risk factors
option_4: Bone metastasis
option_5: Osteochondroma risk factors
option_6: Osteosarcoma staging
option_7: Chondroma pathophysiology