How does cancer spread through the body?

Cancer spreads through the body in several ways:

1. Local invasion: Cancer cells can invade and grow into nearby tissues and organs. This is the most common way that cancer spreads.

2. Lymphatic spread: Cancer cells can enter the lymphatic system, which is a network of vessels and nodes that helps drain fluid from tissues. The cancer cells can then travel to other lymph nodes and organs.

3. Hematogenous spread: Cancer cells can enter the bloodstream and travel to other organs. This is called metastasis. Metastasis is the most common way that cancer spreads to distant sites in the body.

Some cancers are more likely to spread through certain pathways than others. For example, breast cancer is more likely to spread through the lymphatic system, while lung cancer is more likely to spread through the bloodstream.

The spread of cancer can be influenced by several factors, including the type of cancer, the stage of cancer, and the patient's overall health.