What is cancer
Cancer is a class of diseases in which cells grow and divide uncontrollably. There are more than 200 different types of cancer. Each type is classified by the type of cell that is initially affected. Cancer can start in the lungs, the breast, the colon, or even in the blood.
The lymphatic system is part of the immune system.
It consists of a network of vessels that carry a fluid called lymph, similar to
the way that the network of blood vessels carry blood throughout the body.
Lymph contains white blood cells called lymphocytes that are also present in
blood and tissues.Lymphoma is a form of cancer that affects the immune system
- specifically, it is a cancer of immune cells called lymphocytes, a type of
white blood cell. These lymph nodes filter the lymph, which may
carry bacteria,viruses, or other microbes. At infection sites, large
numbers of these microbial organisms collect in the regional lymph nodes and
produce the local swelling and tenderness typical of a localized infection.Lymphocytes recognize infectious
organisms and abnormal cells and destroy them. There are two major subtypes of
lymphocytes: B lymphocytes and T lymphocytes, also referred to as B cells and T
cells. There are two broad types of lymphoma and many subtypes:
people with lymphoma have this type.
two types occur in the same places, may be associated with the same symptoms,
and often have similar appearance on physical examination. However, they are
readily distinguishable via microscopic examination of a tissue biopsy sample
because of their distinct appearance under the microscope and their cell
surface markers. Non-Hodgkin and Hodgkin
lymphoma each affect a different kind of lymphocyte. Every type of lymphoma
grows at a different rate and responds differently to treatment. Even though
lymphoma is cancer, it is very treatable. Many cases can even be cured. Classification is a complicated process, but it helps surgeons and
physicians to determine the best course of action for treating the cancer.
of different classification systems have been proposed over recent years, with
the most commonly used system devised by the World Health Organization (WHO).
This lymphoma classification system helps physicians to standardize how they
Lymphoma is different from leukemia. Each of these cancers starts in a different type of cell.
Lymphoma starts in
Leukemia starts in
blood-forming cells inside bone marrow.
symptoms and signs of lymphoma are very similar to those of simple illnesses
such as viral illnesses and the common cold, and this can cause problems with
delayed diagnosis. The difference is that the symptoms of lymphoma persist long
after the usual run of a viral infection.