What happens when cancer cells break away from a tumor?

When cancer cells break away from a tumor, they can enter the bloodstream or lymphatic system, allowing them to spread to other parts of the body. This process is known as metastasis and can lead to the formation of new tumors in distant organs or tissues. Metastatic cancer is often more difficult to treat and can significantly impact a patient's prognosis and treatment options. Understanding this process is crucial for developing effective cancer therapies and interventions.