Cancer Types And The Cells They Originate From

Leukemia

When an individual's cancer originally develops in their bone marrow, it is referred to as a form of leukemia. The most common types of leukemia originate in white blood cells, but leukemia can form in other blood cells types as well. Types of leukemia are categorized based on the speed at which they progress and the type of blood cell they occur in. Acute lymphocytic leukemia is a fast-growing form of cancer that begins in the tissue where blood cells are produced (bone marrow). Chronic lymphocytic leukemia is slow-growing and begins in the white blood cells within bone marrow. Acute myeloid leukemia and chronic myeloid leukemia begin in the immature cells that form platelets, white blood cells, or red blood cells in the bone marrow, and they invade the blood. Hairy cell leukemia starts in the bone marrow when it makes an excessive amount of white blood cells called lymphocytes.

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Lymphoma

Cancer that starts in an individual's lymphocytes, the cells in the immune system responsible for fighting off pathogens, is referred to as lymphoma. Cancerous lymphocytes that form and grow in the body of a lymphoma patient can travel throughout the lymphatic system and bloodstream. These cancerous lymphocytes can spread to other large organs in the lymphatic system such as the spleen, liver, bone marrow, and lungs. Small lymphocytic lymphoma is a form of cancer similar to chronic lymphocytic leukemia, but it has a different presentation. Hodgkin lymphoma is a rare form of lymphoma associated with Reed-Sternberg cells, a characteristic type of enlarged abnormal lymphocyte. Non-Hodgkin lymphoma is the classification given to any form of lymphoma in a patient that does not fit into the small lymphocytic lymphoma distinction and does not involve Reed-Sternberg cells. Diagnostic tests of a patient's blood and biopsies of the lymphatic tissues are utilized in the diagnosis of lymphoma.

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