About Lymphomas
Lymphomas are a group of conditions that affect the lymphatic system, which is a network of organs, tissues, and vessels that produce, store, and carry white blood cells. The two main categories are non-Hodgkin lymphoma and Hodgkin lymphoma. There are nearly 100 subtypes of lymphomas.
- Non-Hodgkin lymphoma: This is the most common type of lymphoma. It can develop from B and T lymphocytes in the lymph nodes or tissues throughout the body. Non-Hodgkin lymphoma may not affect every lymph node, often skipping some and growing on others.
- Small lymphocytic lymphoma (SLL): Some specialists consider SLL to be a subtype of non-Hodgkin lymphoma. It is a slow-growing cancer that develops from B cells.
- B-cell chronic lymphocytic leukemia (CLL): CLL is another subtype of non-Hodgkin lymphoma where cancer develops slowly in cells that become B cells.
- Splenic lymphoma with villous lymphocytes: This is a subtype of non-Hodgkin lymphoma that primarily involves the spleen and bone marrow.
- Sezary syndrome: This is an aggressive form of cutaneous T-cell lymphoma, which is another subtype of non-Hodgkin lymphoma.
- Hodgkin lymphoma: This type of lymphoma is less common than non-Hodgkin lymphoma. It is characterized by the presence of Reed-Sternberg cells, which are large abnormal cells found in the lymph nodes. Hodgkin lymphoma usually starts in a single group of lymph nodes and spreads in a predictable manner.
Lymphomas are a type of cancer that affects the lymphatic system, which is a part of the immune system. Lymphomas occur when certain white blood cells called lymphocytes, which help fight infections, develop abnormalities in their DNA. These abnormalities cause the lymphocytes to grow and divide uncontrollably, leading to the formation of tumors.
The exact causes of lymphomas are not fully understood, but there are several factors that can increase the risk of developing this type of cancer. Non-modifiable risk factors are factors that a person cannot change or control. Modifiable risk factors are factors that a person potentially can control to reduce their risk of developing disease.
Non-modifiable risk factors of lymphoma include:
- Age: Lymphomas are more common in older adults, with most people being diagnosed at age 65 or older.
- Sex Assigned at Birth: Males have a slightly higher risk of developing lymphomas compared to females.
- Race: White individuals have a higher risk of developing lymphomas compared to African Americans and Asian Americans.
- Family History: Having a close relative, such as a parent or sibling, with lymphoma increases the risk.
Modifiable risk factors of lymphoma include:
- Immune Suppression: Conditions that weaken the immune system, such as HIV infection or taking certain medications that suppress the immune system, can increase the risk of developing lymphomas.
- Infections: Certain viral infections have been linked to an increased risk of lymphomas. For example, the Epstein-Barr virus, which causes mononucleosis, has been associated with higher rates of lymphoma.
- Autoimmune Conditions: Having an autoimmune condition, such as rheumatoid arthritis, where the immune system mistakenly attacks healthy tissues, may elevate the risk.
- Medications: Some medications, including certain immune-suppressing drugs called TNF antagonists, have been associated with an increased risk of lymphoma.
- Chemical Exposure: Exposure to certain toxins and pesticides could raise the risk of developing lymphoma.
The most common early symptom of lymphoma is swollen lymph nodes, which are often found in the groin, armpit, and side of the neck. These swollen lymph nodes may feel like painless bumps or lumps. However, it's important to note that not all swollen lymph nodes are caused by cancer.
In addition to swollen lymph nodes, there are other common symptoms that may occur with later stages, progression, or higher severity of lymphomas. These symptoms can vary depending on the specific type of lymphoma and where it affects the body. Here are some examples:
- Fevers, chills, and night sweats
- Unexplained weight loss (10% loss of body weight or more over 6 months)
- Exhaustion or extreme fatigue
- Bruising or bleeding easily
- Frequent or severe infections
Depending on the region of the body impacted by lymphoma, additional symptoms may occur. Here are some examples:
Symptoms of lymphoma in the abdomen:
- Feeling full after eating a small amount
- Loss of appetite
- Vomiting or nausea
- Abdominal pain and swelling
Symptoms of lymphoma in the chest:
- Cough
- Shortness of breath
- Trouble breathing
- Chest pressure or pain
Symptoms of lymphoma in the brain:
- Headache
- Trouble thinking
- Facial numbness
- Weakness
- Seizures
- Personality changes
- Double vision
- Trouble speaking
Lymphomas involving the skin tend to cause:
- Purple or red bumps and lumps under the skin
- Itchy skin rashes
When diagnosing lymphomas, doctors use a variety of examinations, tests, and procedures to determine the type of lymphoma and its stage. Here are some common ones:
- Personal and family history: Doctors will begin by taking a personal and family medical history to gather important information about the individual's health background.
- Physical examination: A doctor will conduct a physical examination to check for any physical signs of a medical problem, such as pain, swelling, or the presence of masses in the body.
- Blood tests: Doctors may order blood tests to analyze different components of the blood, including a complete blood count (CBC) to check the number of red blood cells, white blood cells, and platelets present in the blood. Blood chemistry studies can also be performed to assess certain substances in the blood.
- Urine test: A urine test may be carried out to provide additional information about the individual's health status.
- Imaging scans: Imaging scans such as X-rays, CT scans, MRI scans, and PET scans can provide detailed images of the body's internal structures. These scans help doctors visualize any abnormalities or signs of cancer.
- Bone marrow biopsy: In some cases, doctors may need to perform a bone marrow biopsy. This procedure involves using a long needle to remove small amounts of bone marrow from the bone. The sample is then examined under a microscope by a pathologist to check for signs of cancer.
- Lymph node biopsy: If lymphoma is suspected, a doctor may need to perform a lymph node biopsy. This procedure involves removing a small piece of tissue from an enlarged lymph node to examine it for cancer cells.
It's important to note that the specific examinations, tests, and procedures used may vary depending on the type of lymphoma being diagnosed. Additional tests may be necessary to determine the exact type and stage of lymphoma. These can include:
- Additional imaging scans: Depending on the suspected type and location of lymphoma, additional imaging scans such as ultrasound or bone scans may be performed.
- Specialized blood tests: Some types of lymphoma require specialized blood tests to determine specific markers or genetic abnormalities associated with that particular type.
- Flow cytometry: Flow cytometry is a laboratory technique that can help identify specific types of cells in a sample. It is often used in diagnosing certain types of lymphomas.
- Genetic testing: Genetic testing may be conducted to look for specific genetic mutations or alterations that are associated with certain types of lymphomas.
The general goals of treatment for lymphomas are to eliminate or control the cancer, relieve symptoms, and improve overall quality of life. Treatment options may vary depending on the specific type and stage of the lymphoma, as well as the individual's overall health. Here are some common treatment approaches and how they work to achieve these goals:
- Chemotherapy: Chemotherapy is the main treatment for lymphoma. It uses drugs to kill or inhibit the growth of cancer cells. Different chemotherapy plans may be used depending on the specific type of lymphoma. Chemotherapy can shrink cancer cells and help control the disease.
- Radiation therapy: Radiation therapy uses high-energy rays to target and destroy cancer cells. It can be used alone or in combination with chemotherapy. Radiation therapy helps to kill cancer cells and reduce tumor size.
- Immunotherapy: Immunotherapy stimulates the body's immune system to recognize and attack cancer cells. It helps the immune system to find and destroy lymphoma cells. Immunotherapy can be an effective treatment option for some types of lymphoma.
- Surgery: Surgery may be considered in certain cases, especially for localized cancers. Surgery involves removing the tumor or affected tissue to eliminate cancer cells.
- Stem cell transplant: In certain cases, a stem cell transplant may be recommended, particularly for lymphomas that recur or resist treatment. This procedure replaces cancerous bone marrow cells with healthy stem cells to develop new bone marrow, which helps strengthen the immune system.
- Supportive therapy: In addition to specific treatments, doctors may recommend supportive therapy to reduce disease symptoms and manage side effects of treatment. For example, antinausea medication can help with chemotherapy-related nausea.
It's important to note that treatment plans are individualized based on factors such as the type of lymphoma, its stage, and the person's overall health. The healthcare team will work closely with each person to determine the most appropriate treatment approach that aligns with their specific needs and goals.
The natural progression of lymphomas can vary depending on the specific type. However, in general, lymphomas can progress and spread over time if left untreated. They can affect the lymph nodes and other parts of the body, leading to symptoms such as swollen lymph nodes, fatigue, unexplained weight loss, night sweats, and fever.
Complications of lymphomas can also vary depending on the type and stage of the cancer. Some common complications include:
- Infections: Lymphomas can weaken the immune system, making individuals more susceptible to infections.
- Organ damage: As lymphomas progress, they can affect various organs in the body, leading to complications such as liver or kidney dysfunction.
- Compression of nearby structures: Enlarged lymph nodes or tumors can compress nearby structures like blood vessels or nerves, causing pain or other symptoms.
- Metastasis: In some cases, lymphomas can spread to other parts of the body, leading to additional complications and affecting overall prognosis.
It's important to note that each person's prognosis and treatment plan are unique. It's always recommended to consult with a healthcare professional who can provide personalized advice based on individual circumstances.