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Patient ReportsUnderstanding Osteosarcoma and Its Effects on Bone Health
Written by Medicover Team and Medically Reviewed by Dr Kovvuru Bhaskar Reddy , Oncologists
Table of Contents
Osteosarcoma is the most common type of primary bone cancer. It develops when bone-forming cells (osteoblasts) grow uncontrollably, creating a malignant tumour that usually affects the long bones, particularly around the knee, upper arm, or lower leg. Osteosarcoma most commonly occurs in children, teenagers, and young adults during periods of rapid bone growth, although it can also develop in adults.
Early diagnosis and prompt treatment are essential to prevent the cancer from spreading to other parts of the body, particularly the lungs. Modern treatment combines surgery and chemotherapy to improve survival while preserving limb function whenever possible.
What Are the Types of Osteosarcoma?
Osteosarcoma is classified into different types based on its location, appearance, and microscopic characteristics.
- Conventional Osteosarcoma: The most common type, including osteoblastic, chondroblastic, and fibroblastic variants. It usually develops in the long bones.
- Telangiectatic Osteosarcoma: A rare, aggressive subtype containing blood-filled cystic spaces.
- Periosteal Osteosarcoma: Develops from the outer surface of the bone and generally has a better prognosis than conventional osteosarcoma.
- Parosteal Osteosarcoma: A slow-growing, low-grade tumour arising from the outer bone surface.
- High-Grade Surface Osteosarcoma: A rare and aggressive tumour that develops on the bone surface.
What Are the Symptoms of Osteosarcoma?
Symptoms usually develop gradually and may initially be mistaken for sports injuries or growing pains. Persistent symptoms should always be evaluated by a doctor.
- Persistent bone pain, especially at night or during activity
- Swelling or a lump near a bone or joint
- Tenderness over the affected area
- Reduced joint movement or stiffness
- Limping or difficulty using the affected limb
- Bone fractures after minor injury due to weakened bone
What Are the Causes of Osteosarcoma?
The exact cause of osteosarcoma is not always known, but it develops due to genetic changes that cause abnormal bone-forming cells to grow uncontrollably.
- Genetic mutations affecting bone-forming cells
- Inherited conditions such as Li-Fraumeni syndrome
- Hereditary retinoblastoma (RB1 gene mutation)
- Previous exposure to high-dose radiation therapy
- Rapid bone growth during adolescence
When Should You See a Doctor for Osteosarcoma?
Consult a doctor if persistent bone pain, swelling, or reduced limb movement does not improve. Early diagnosis improves treatment outcomes and reduces the risk of cancer spreading.
- Persistent bone pain lasting several weeks
- Swelling or a growing lump near a bone
- Difficulty walking or reduced limb movement
- Repeated bone pain that worsens at night
Seek immediate medical attention if:
- A sudden fracture after a minor injury
- Rapidly increasing swelling or severe pain
- Difficulty using the affected arm or leg
Osteosarcoma is usually treated by an oncologist, medical oncologist, radiation oncologist, and rehabilitation specialist.
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How Is Osteosarcoma Diagnosed?
Doctors use imaging studies, laboratory tests, and biopsy to confirm osteosarcoma and determine whether the cancer has spread.
- Physical examination and medical history
- X-rays of the affected bone
- MRI scan to assess tumour size and surrounding tissues
- CT scan to evaluate bone involvement and lung metastasis
- PET scan or bone scan to detect cancer spread
- Blood tests including alkaline phosphatase and LDH levels
- Needle or surgical biopsy to confirm the diagnosis
What Are the Treatment Options for Osteosarcoma?
Treatment depends on the tumour's size, location, stage, and whether it has spread. Most patients receive a combination of chemotherapy and surgery.
Chemotherapy
- Given before surgery to shrink the tumour
- Continued after surgery to destroy remaining cancer cells
- Common drugs include methotrexate, doxorubicin, and cisplatin
Surgery
- Limb-salvage surgery: Removes the tumour while preserving the affected limb whenever possible.
- Amputation: May be required if the tumour cannot be safely removed while preserving limb function.
- Reconstructive surgery using bone grafts or implants when needed.
Radiation Therapy
- Used in selected cases when surgery is not possible or when cancer remains after surgery.
- Advanced techniques such as proton therapy may reduce damage to surrounding tissues.
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What Are the Risk Factors for Osteosarcoma?
- Age between 10 and 30 years
- Rapid adolescent growth spurts
- Family history of inherited cancer syndromes
- Li-Fraumeni syndrome
- Hereditary retinoblastoma
- Previous radiation therapy
- Certain inherited bone disorders
What Are the Complications of Osteosarcoma?
- Spread of cancer to the lungs or other bones
- Pathological fractures
- Reduced limb function
- Treatment-related side effects
- Recurrence after treatment
Can Osteosarcoma Be Prevented?
There is no guaranteed way to prevent osteosarcoma. However, early evaluation of persistent bone pain and appropriate monitoring of individuals with inherited cancer syndromes can support earlier diagnosis.
- Attend regular medical follow-ups if you have inherited cancer syndromes.
- Seek prompt evaluation for persistent bone pain or swelling.
- Follow recommended cancer surveillance if you have a strong family history.
- Maintain regular health check-ups after previous radiation therapy.
Frequently Asked Questions
1. What are the symptoms of osteosarcoma?
Symptoms include localized bone pain, swelling near joints, and, in advanced cases, fractures due to weakened bones.
2. What causes osteosarcoma?
Osteosarcoma is caused by genetic mutations that lead to uncontrolled bone cell growth. It often affects the long bones during periods of rapid growth, such as adolescence.
3. How is osteosarcoma treated?
Treatment includes chemotherapy to shrink the tumor, followed by surgery to remove the cancerous bone. In some cases, radiation therapy may be used.
4. How is osteosarcoma diagnosed?
Diagnosis involves imaging tests like X-rays, MRIs, and biopsies to confirm the presence of cancerous cells. Blood tests may also be used to monitor for cancer markers.
5. What are the types of osteosarcoma?
Types include conventional osteosarcoma, telangiectatic osteosarcoma, and small cell osteosarcoma, each with varying degrees of aggressiveness and treatment approaches.
