Cancer Health Center

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There are three ways that cancer spreads in the body.

The three ways that cancer spreads in the body are:

• Through tissue. Cancer invades the surrounding normal tissue.
• Through the lymph system. Cancer invades the lymph system and travels through the lymph vessels to other places in the body.
• Through the blood. Cancer invades the veins and capillaries and travels through the blood to other places in the body.

When cancer cells break away from the primary (original) tumor and travel through the lymph or blood to other places in the body, another (secondary) tumor may form. This process is called metastasis. The secondary (metastatic) tumor is the same type of cancer as the primary tumor. For example, if breast cancer spreads to the bones, the cancer cells in the bones are actually breast cancer cells. The disease is metastatic breast cancer, not bone cancer.

Stages of AIDS-related lymphoma may include E and S.

AIDS-related lymphoma may be described as follows:

• E: "E" stands for extranodal and means the cancer is found in an area or organ other than the lymph nodes or has spread to tissues beyond, but near, the major lymphatic areas.
• S: "S" stands for spleen and means the cancer is found in the spleen.

The following stages are used for AIDS-related lymphoma:

Stage I

Stage I AIDS-related lymphoma is divided into stage I and stage IE.

• Stage I: Cancer is found in one lymph node group.
• Stage IE: Cancer is found in an area or organ other than the lymph nodes.

Stage II

Stage II AIDS-related lymphoma is divided into stage II and stage IIE.

• Stage II: Cancer is found in two or more lymph node groups on the same side of the diaphragm (the thin muscle below the lungs that helps breathing and separates the chest from the abdomen).
• Stage IIE: Cancer is found in an area or organ other than the lymph nodes and in lymph nodes near that area or organ, and may have spread to other lymph node groups on the same side of the diaphragm.

Stage III

Stage III AIDS-related lymphoma is divided into stage III, stage IIIE, stage IIIS, and stage IIIS+E.

• Stage III: Cancer is found in lymph node groups on both sides of the diaphragm (the thin muscle below the lungs that helps breathing and separates the chest from the abdomen).
• Stage IIIE: Cancer is found in lymph node groups on both sides of the diaphragm and in an area or organ other than the lymph nodes.
• Stage IIIS: Cancer is found in lymph node groups on both sides of the diaphragm and in the spleen.
• Stage IIIS+E: Cancer is found in lymph node groups on both sides of the diaphragm, in an area or organ other than the lymph nodes, and in the spleen.