What is the term used to describe the property of malignant tumors where cells from the primary tumor spread to distant sites and form new tumors?

Metastasis

The term used to describe the property of malignant tumors where cells from the primary tumor spread to distant sites and form new tumors is (a) Metastasis.

Metastasis is a critical characteristic of malignant tumors. It involves the dissemination of cancer cells from the primary tumor through the bloodstream or lymphatic system to other parts of the body. These cancer cells can invade and establish secondary tumors in distant organs or tissues, leading to the spread and progression of the disease.

During metastasis, cancer cells detach from the primary tumor, invade surrounding tissues, and enter the bloodstream or lymphatic vessels. They are carried to different sites in the body where they can settle and form new tumors. This process is facilitated by various mechanisms, including the ability of cancer cells to break down tissue barriers, migrate, and survive in different microenvironments.

Metastasis is a major concern in cancer because it can significantly affect the prognosis and treatment options for patients. The presence of metastatic tumors indicates an advanced stage of cancer and often requires more aggressive therapeutic interventions.

In summary, metastasis is the term used to describe the process by which cancer cells from a primary tumor spread to distant sites in the body, leading to the formation of secondary tumors.