About Bone Cancers
Bone cancer is a group of diseases that affect the bones and the cells that form them. There are several types of bone cancers, including:
Primary bone cancer: This type of bone cancer begins in the bone cells themselves. Some examples of primary bone cancer include:
- Osteosarcoma: The most common type of bone cancer, osteosarcoma usually affects young bone cells and is commonly seen in people aged 10 to 30.
- Ewing sarcoma: The second most common form of bone cancer, Ewing sarcoma is most frequently found in individuals under the age of 30. It can develop in both bones and soft tissues.
- Chondrosarcoma: This type of bone cancer starts in the cartilage, which is a flexible tissue found at the ends of bones.
Secondary bone cancer (mone metastasis): Secondary bone cancer occurs when cancer from another part of the body spreads to the bones. It is more common than primary bone cancer. Some examples include:
- Breast cancer that has spread to the bones
- Lung cancer that has metastasized to the bones
- Prostate cancer that has spread to the bones
It's important to note that not all tumors in the bones are cancerous. Some benign (noncancerous) tumors can also occur in the bones, such as osteomas, osteoblastomas, and osteochondromas.
The exact causes of bone cancer are not yet fully understood, but there are possible causes of bone cancer include changes to the DNA in bone cells that cause them to become cancerous. These changes may be inherited or acquired during a person's lifetime. Experts believe that an acquired genetic mutation within the cells of the bones is the main cause of primary bone cancers.
Risk factors include:
- Genetic factors: Certain inherited conditions, such as retinoblastoma and Li-Fraumeni syndrome, can increase the risk of developing bone cancer.
- Family history: Having a close relative with bone cancer can slightly increase a person's risk.
- Age: Some types of bone cancers are more likely to occur in certain age groups, although bone cancer can affect people of all ages.
- Previous radiation treatment: People who have received radiation therapy for a different type of cancer may have a higher risk of developing bone cancer later in life.
- Certain benign bone conditions: Conditions like Paget's disease and multiple exostoses (a condition that people inherit) can increase the risk of specific types of bone cancer.
- Exposure to radiation: Being exposed to radiation, either through medical treatments or environmental factors, may increase the risk of developing bone cancer.
- History of bone marrow transplant: Individuals who have undergone a bone marrow transplant in the past may have a higher risk of developing bone cancer.
- Long-term inflammatory diseases: People with chronic inflammatory conditions, such as Paget's disease, might be at a slightly higher risk of developing bone cancer later in life.
It's important to note that having one or more of these risk factors does not mean that a person will definitely develop bone cancer. It simply means that their chances may be higher compared to those who do not share the same risk factors. Additionally, most cases of bone cancer do not have any known risk factors identified.
The most common symptoms of bone cancer include:
- Pain: Bone cancer often causes pain where the tumor is growing. At first, the pain may only occur occasionally. It may worsen when a person uses the bone, such as lifting something with a tumor in their arm. Over time, the pain may become more constant.
- Broken bones: Bone cancer can weaken the bones, making them more prone to fractures. Sometimes, fractures can occur for no apparent reason.
- Swelling: Some cancers cause the tissue surrounding the bone to swell. This can result in a noticeable lump or swollen spot.
- Weakness: Bone cancers that affect the spine may put pressure on the spinal cord, leading to weakness or tingling sensations.
- Fatigue: Like other cancers, bone cancer can cause unexplained fatigue.
- Weight loss: Cancer can sometimes lead to sudden and unintentional weight loss.
- Fever and anemia (low blood counts)
- Increased swelling or a larger lump
- Difficulty moving around or limping
It's important to note that these symptoms can also be caused by other conditions and not necessarily indicate bone cancer. If you experience any new or persistent symptoms, it's always a good idea to consult with a doctor for an accurate diagnosis.
To diagnose bone cancer, doctors typically use a combination of examinations, tests, and procedures. These can help confirm the presence of cancer and determine its type and stage. Here are the commonly performed tests:
- X-rays: X-rays are often the first test performed to provide detailed images of the bones. They can show the location, size, and shape of a bone tumor.
- Magnetic resonance imaging (MRI) and computed tomography (CT) scans: These imaging tests provide doctors with more information about the affected bone and the tumor. They can help determine the size, location, and staging of tumors.
- Biopsy: A biopsy is a procedure that confirms a bone cancer diagnosis and determines its type. During a biopsy, a sample of the bone is removed for examination in a lab. This helps identify cancer cells and provides important information about the aggressiveness of the cancer.
In addition to these tests, there are additional examinations and procedures that can help determine the type of bone cancer:
- Blood tests: Certain types of bone cancer may cause elevated levels of specific enzymes in the blood, such as alkaline phosphatase and lactate dehydrogenase. Blood tests can help identify these elevated levels, which may suggest advanced cancers.
- Bone scan: This test involves injecting a small amount of radioactive material into a vein, which collects in the bones and can be detected by a scanner. It helps identify areas of abnormal bone activity that may indicate cancerous growth.
- Positron emission tomography scan (PET): A PET scan involves injecting a small amount of radioactive glucose into a vein. Cancer cells often use more glucose than normal cells, so a scanner can detect their presence in the body.
By combining these examinations, tests, and procedures, doctors can diagnose bone cancer and determine its type and stage. It's important to note that each person's diagnostic process may vary based on their specific situation.
The general goals of treatment for bone cancers are to remove or destroy the cancerous tumor, manage symptoms, and improve overall quality of life. The specific treatment options may vary depending on the type, size, location, and stage of the cancer, as well as the individual's age and overall health.
Here are the general medication types, therapeutic procedures, lifestyle behavior changes, and other treatments recommended for bone cancers:
Surgery:
- Surgeons may use specific techniques to remove the cancerous cells while causing the least damage to surrounding healthy cells. Depending on the location and size of the tumor, surgery may involve amputation of the affected limb or reconstruction using bone grafts or artificial implants.
Radiation therapy:
- Radiation therapy uses high-energy radiation to destroy cancer cells. High-energy rays or particles are targeted at the tumor to kill cancer cells. However, as high doses are necessary to treat bone cancer, this can cause damage to nearby tissues. Therefore, radiation therapy is not typically the main treatment for most types of bone cancer.
Chemotherapy:
- Chemotherapy uses drugs to kill cancer cells. Drugs are administered via a vein to treat cancer. Chemotherapy is often an important part of treatment for Ewing sarcoma and osteosarcoma. However, chemotherapy drugs are usually less effective for other types of bone cancer.
Targeted therapy:
- Targeted therapy is a treatment that uses drugs to target specific proteins on the surface of cancer cells. Targeted therapy drugs are designed to interfere with specific molecules that allow cancer cells to grow and spread. Doctors may recommend targeted therapy alone or in combination with other treatments.
Pain management medications:
- A doctor may recommend pain-relieving medications such as nonsteroidal anti-inflammatory drugs (NSAIDs) or opioids to help manage pain associated with bone cancer.
Cryosurgery:
- Cryosurgery uses liquid nitrogen to freeze and destroy cancer cells. This procedure is an option when traditional surgery is not possible. Liquid nitrogen is applied directly to the tumor, freezing and killing the cancer cells.
It's important to note that these treatment options may be used alone or in combination depending on the specific circumstances of each individual's case. The choice of treatment will be determined by healthcare professionals based on factors such as the type and stage of bone cancer, tumor size and location, age, and overall health.
The natural progression of bone cancers can vary depending on the specific type of cancer. However, in general, bone cancers can progress and spread over time if left untreated. They can invade nearby tissues and organs, leading to complications and a poorer prognosis.
The complications of bone cancers also depend on the type and stage of the cancer. Some common complications include:
- Fractures: Bone cancers can weaken the affected bones, making them more prone to fractures or breaks.
- Pain: Bone cancers can cause persistent and severe pain in the affected area. This pain can be debilitating and affect a person's quality of life.
- Limited mobility: As bone cancers grow and spread, they can restrict movement in the affected area, leading to limited mobility.
- Metastasis: In some cases, bone cancers can spread to other parts of the body, such as the lungs or liver. This is called metastasis and can further complicate treatment and prognosis.
- Hypercalcemia: Certain types of bone cancers can release calcium into the bloodstream, leading to a condition called hypercalcemia. This can cause symptoms such as fatigue, nausea, confusion, and increased thirst.
It's important to note that the impact of treatment for bone cancers can vary depending on the specific type and stage of the cancer, as well as individual factors. It's crucial for individuals with bone cancers to work closely with their healthcare team to determine the most appropriate treatment plan for their specific situation. Treatment decisions should always be made in consultation with a healthcare professional who has access to a person's complete medical history and understands their individual needs and preferences.