An abnormal cell that grows and proliferates out of control will give rise to tumor or neoplasm. Benign: as long as the tumor cells do not become Invasive Malignant: tumor cells have acquired the a bility to invade surrounding tissues. a a tumor is considered a cancer only if it is malignant Metastasis: spread of malignant tumor cells throughout the body (typically through the blood and lymphatic system)◼ An abnormal cell that grows and proliferates out of control will give rise to tumor or neoplasm. ◼ Benign: as long as the tumor cells do not become invasive; ◼ Malignant: tumor cells have acquired the ability to invade surrounding tissues. ◼ A tumor is considered a cancer only if it is malignant. ◼ Metastasis: spread of malignant tumor cells throughout the body (typically through the blood and lymphatic system)