Non Hodgkin Lymphoma- What it is all about with AIDS?
Non-Hodgkin Lymphoma (NHL) is an opportunistic infection of AIDS, where people who subjected to AIDS have high risk of having this cancer as their immune system slows down gradually.
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What is non-Hodgkin lymphoma?
Non-Hodgkin lymphoma (NHL) is cancer that begins in lymphocytes,
white blood cells that are an important part of the body’s infection-fighting
immune system.
In people with lymphoma, something goes wrong inside the
lymphocytes.
- Lymphocytes
are a type of white blood cell made in the bone marrow and found in the
blood and lymph tissue.
- In
lymphoma, the lymphocytes don’t mature and can’t carry out their normal
immune functions defending against infection.
- The
lymphoma cells don’t die off like they should but instead collect in the
lymph nodes.
- NHL
can spread through the lymph system to other lymph nodes and outside the
lymph nodes to the bone marrow, lungs or liver.
- NHL
can be cured or controlled for many years in many people who have the
disease.
Types of NHL
It’s
important to correctly identify the type and sub type of your lymphoma to
determine which treatments are most likely to be effective.
There are two main types
of lymphoma:
- Hodgkin lymphoma,
which involves Reed-Sternberg cells, abnormal B cells
- Non-Hodgkin lymphoma,
in which there are no Reed-Sternberg cells
Within NHL, there are
about 60 types and sub types based on:
- Whether
the disease originates from B cells or T cells
- Whether
it is fast or slow growing
- How
and where the cells grow in the body
- The
genetic characteristics and other molecular features of the cells affected
- Their
appearance under a microscope
B-cell lymphoma or T-cell
lymphoma?
Most NHL's about 90 percent — begin in the B cells. The
most common sub type of B-cell lymphoma is diffuse large B-cell lymphoma,
but there are several other NHL B-cell subtypes.
About 10 percent of
NHL's begin in the T cells. In some of these, natural killer cells are
also involved. These are called NK /T-cell lymphomas. Read more about NHL T-cell subtypes.
Cutaneous lymphoma,
a rare NHL, may be either B-cell or T-cell type. It occurs mainly in the skin
but may involve lymph nodes, blood and other organs.
Indolent lymphoma or
aggressive lymphoma?
NHL's are often described by how quickly they grow.
- Indolent (low-grade) NHL tends to grow
slowly and cause fewer symptoms. The most common indolent sub type is
follicular lymphoma. Over time, indolent NHL may transform into aggressive
NHL.
- Aggressive (high-grade) NHL tends
to grow and spread quickly and cause severe symptoms. The most common
aggressive sub type is diffuse large B-cell lymphoma.
Some subtypes have
features of both indolent and aggressive disease, making them difficult to
classify into either group.
Where did the lymphoma
start?
Names of some NHL
subtypes relate to the area where the disease originates.
- Nodal lymphomas originate in
the lymph nodes.
- extra nodal lymphomas start in
places other than the lymph nodes.
- Follicular lymphoma usually starts
in the follicle cells in the lymph, and it grows in a follicular pattern,
meaning the cells clump together.
- Mantle cell lymphoma originates in
the mantle zone, or outer layer, of the lymph node.
- Marginal lymphomas start in the
interface (margin) between lymphoid and non-lymphoid pulp in the spleen
and lymph nodes.
Symptoms of NHL
Symptoms of NHL can come
on very quickly. Some people are diagnosed with the disease within days to
weeks of getting symptoms. Some types of NHL come on slowly over several months.
NHL symptoms may be
similar to symptoms caused by other conditions that are not related to cancer.
Check with your doctor if you feel concerned about any symptoms you have.
Symptoms of NHL include:
- Painless
swollen lymph nodes in your neck, underarm, groin, chest or abdomen
- Unexplained
fever, weight loss or night sweats
- Ongoing
fatigue
- Itchy
skin
- Red
bumps on your skin
- Swelling
in your face, neck or upper chest
- Feeling
of fullness in your abdomen (from an enlarged liver, spleen or lymph nodes)
- Abdominal
problems, such as nausea, vomiting and indigestion
Diagnosing NHL
If your doctor suspects you may have lymphoma, they will do a
physical exam to look for signs of the disease and ask about your health
history.
To confirm the presence of lymphoma, you will need a biopsy. This
means removing part or all of a lymph node or a small sample of tissue
surgically or with a needle. Experts in identifying blood-related cancers
(hematopathologists) look at the cells under a microscope to diagnose the
disease and accurately identify the type.
You might also have any or all of these tests:
- Imaging
tests — such as a chest X-ray, ultrasound, magnetic resonance imaging
(MRI), computed tomography (CT) scan or positron emission tomography (PET)
scan to see pictures of the inside of your body and look for enlarged
lymph nodes, tumors or other cancer activity
- Blood
tests — to check the types and numbers of blood cells (complete blood
count) and look for chemicals that signal disease in certain organs or
tissues (blood chemistry analysis)
- Lumbar
puncture — taking a sample of cerebrospinal fluid from your spine with a
needle to check for cancer cells
- Bone
marrow tests — taking samples of bone marrow and a small piece of bone
from your pelvis using a needle (bone marrow aspiration and biopsy) to
check for cancer cells
If you have lymphoma, you may need more tests to identify the type
or subtype. These include an immunohistochemistry study; immunophenotyping, or
flow cytometry; and cytogenetic analysis.
Stages of NHL
Staging means finding out how far lymphoma has spread in your
lymph system or other parts of your body. Accurate staging allows your doctors
to choose the most appropriate therapy for you — and help you avoid therapy
that is not likely to be effective in your situation.
NHLs range from stage I to stage IV, with I being the least
advanced and IV being the most advanced.
Doctors may add a letter after your stage to describe more about
your disease.
- E
(such as “stage IIIE”) means your cancer is outside your lymph nodes
(extranodal).
- S
(such as “stage IIIS”) means the cancer is in your spleen.
If your lymphoma comes back after treatment, it is called
recurrent or relapsed. Your doctor will order imaging or other tests to restage
it.
How common is NHL?
NHL is one of the most common cancers in the United States, with
about 72,000 people newly diagnosed each year.
What causes NHL?
Doctors do not know what causes NHL. It is more common in men than
in women, and the risk increases with age.
You may be at higher risk if any of these is true:
- Your
immune system is weakened by an inherited disease, autoimmune disease,
human immunodeficiency virus (HIV) or drugs given because you had an organ
transplant.
- You
have been infected with human T-lymphotropic virus type I (HTLV-1),
Epstein-Barr virus (which causes mononucleosis), Helicobacter pylori (a
bacterium that causes ulcers) or hepatitis C virus.
- You
were exposed to certain chemicals, such as ingredients in pesticides,
herbicides, solvents or fertilizers.
Keep in mind that many people who get the disease have none of
these risk factors, and most people with these risk factors do not develop the
disease.
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