B-Cell Small Lymphocytic Lymphoma

B-cell small lymphocytic lymphoma is a slow-growing blood cancer that affects the lymphatic system. Many people live with this condition for years without symptoms, and when treatment is needed, there are effective options available to help manage the disease and maintain quality of life.

Table of contents

• What is B-cell small lymphocytic lymphoma?
• The connection to chronic lymphocytic leukemia
• Signs and symptoms
• How the condition is diagnosed
• Treatment approaches
• Living with the condition

What is B-cell small lymphocytic lymphoma?

B-cell small lymphocytic lymphoma, often called SLL, is a type of blood cancer that develops in the lymphatic system (a network of organs, vessels, and tissues that helps the body fight infection). The condition is classified as a non-Hodgkin lymphoma, which is one of the two main categories of lymphoma^[1][2].

In SLL, abnormal lymphocytes (a type of white blood cell) multiply to form tumors. Specifically, the condition affects B cells, also called B lymphocytes, which are an important part of the immune system^[2][3].

SLL is considered an indolent or slow-growing type of lymphoma. This means it typically progresses gradually over time, rather than developing quickly^[5][11]. Because of this slow growth, you can have SLL for months or even years before developing symptoms. Some people are diagnosed while receiving tests or treatment for an unrelated condition^[3][5].

The cancer cells in SLL are most often found in the lymph nodes and spleen, though the condition can also affect the blood, bone marrow, and other parts of the body^[5][13].

The connection to chronic lymphocytic leukemia

Small lymphocytic lymphoma and chronic lymphocytic leukemia (CLL) are very closely related. Healthcare professionals often mention these conditions together because they are thought to be different versions of the same disease^[5][13].

The main difference between SLL and CLL is where the cancer cells are found in the body. In SLL, the cancer cells are mainly found in the lymph nodes and spleen. In CLL, the cancer cells are most often found in the blood and bone marrow^[5][13].

Because these conditions are so similar, they are managed in the same way. Doctors use the same staging systems and treatment approaches for both SLL and CLL^[12][13].

Signs and symptoms

Small lymphocytic lymphoma symptoms may not appear right away. You can have the condition without experiencing any obvious signs, especially in the early stages. Symptoms might develop gradually as the cancer progresses^[5][3].

When symptoms do occur, they may include^[3][5]:

• Swollen lymph nodes in the neck, underarms, or groin that are usually painless
• Drenching night sweats that soak through your clothing and bedding
• Extreme tiredness or fatigue that doesn’t improve with rest
• Unintended weight loss
• Fever without an obvious infection
• Feeling full quickly when eating or abdominal pain (if the spleen or liver is enlarged)
• Frequent infections

Sometimes SLL can change into a more aggressive form of lymphoma called diffuse large B-cell lymphoma. This transformation is known as Richter transformation^[13].

How the condition is diagnosed

Diagnosing small lymphocytic lymphoma typically begins with a physical examination. Your doctor will check for swollen lymph nodes in your neck, underarms, and groin, and will feel your abdomen to see if your spleen or liver is enlarged^[9][20].

Several tests and procedures are used to confirm a diagnosis^[9][20]:

Blood tests play an important role in diagnosis. A complete blood count measures the number of different types of cells in your blood. In SLL, there may be a high number of B lymphocytes. Other blood tests check the size, shape, and appearance of cells, and measure levels of certain substances like lactate dehydrogenase (LDH), which is often higher in people with lymphoma^[9][20].

Biopsy is a key diagnostic procedure. Your doctor may recommend removing all or part of a lymph node or taking a tissue sample from another part of your body. The sample is examined in a laboratory to look for cancer cells and determine the specific type of lymphoma^[9][20].

Imaging tests create pictures of the inside of your body. These may include CT scans, PET scans, or ultrasound. Imaging helps doctors see the size and location of affected lymph nodes and determine if other organs are involved^[9][20].

Your healthcare team may also perform tests to check for viruses such as HIV, hepatitis B, and hepatitis C, as the presence of these viruses can affect treatment decisions^[9][20].

Treatment approaches

Not everyone with small lymphocytic lymphoma needs treatment right away. Because the condition usually grows slowly, doctors may recommend a “watch and wait” approach if you don’t have symptoms. This means your healthcare team will monitor your condition closely with regular check-ups and tests, but won’t start treatment until it becomes necessary^[2][5][10].

When treatment is needed, several options are available^[2][5][10]:

Targeted therapy uses drugs that specifically attack cancer cells. These medications work by targeting certain features of cancer cells while causing less harm to normal cells. Small molecule kinase inhibitors are examples of targeted therapies used for SLL^[2][12].

Immunotherapy helps your immune system fight the cancer. This includes treatments with monoclonal antibodies, which are proteins designed to recognize and attach to cancer cells^[2][5].

Chemotherapy uses drugs to kill rapidly dividing cells, including cancer cells. It is often combined with immunotherapy in what’s called chemoimmunotherapy^[2][5][12].

Radiation therapy uses high-energy beams to destroy cancer cells. It may be used to treat specific areas where lymphoma is causing problems^[2][5].

CAR-T cell therapy is a newer treatment that modifies your own immune cells to help them recognize and attack cancer cells^[2][5].

Bone marrow transplant, also called stem cell transplant, may be an option for some people. This procedure replaces diseased bone marrow with healthy stem cells^[2][5].

Clinical trials give patients access to new treatments that are being studied. These trials test promising therapies that may become standard treatments in the future^[2][5].

Treatment usually can’t cure SLL, but it can control the disease for a long time. Many people with this type of cancer have a good outlook and can maintain a good quality of life^[5][13].

Living with the condition

Living with small lymphocytic lymphoma involves taking care of your overall health and working closely with your healthcare team. Because SLL affects the immune system, it’s important to take precautions to avoid infections and maintain your well-being.

Regular follow-up appointments are essential. Your doctor will monitor your condition with physical exams and blood tests to check how the disease is progressing and whether treatment is working. These visits also provide opportunities to discuss any concerns or side effects you may be experiencing.

A healthy lifestyle can support your overall health and help you feel better. This includes eating a balanced diet with plenty of fruits, vegetables, whole grains, and lean protein. Staying physically active within your abilities can help reduce fatigue and improve your mood. It’s also important to get enough rest and manage stress.

Because SLL affects your immune system, you may be more susceptible to infections. Take extra care with hygiene, avoid people who are sick when possible, and talk to your doctor about which vaccines are recommended for you.

Many people adjust well to life with SLL and find a “new normal.” Support from family, friends, and healthcare professionals can make a significant difference. Some people also find it helpful to connect with others who have similar experiences through support groups.

SLL, small lymphocytic lymphoma

• Lymph nodes
• Spleen
• Blood
• Bone marrow
• Lymphatic system