ATI Pathophysiology Practice Exam

The distinguishing feature between benign and malignant tumors lies in their behavior regarding tissue invasion and metastasis. Benign tumors are characterized by their non-invasive nature; they grow locally and do not infiltrate surrounding tissues. This means they typically remain encapsulated, which makes them easier to remove surgically and less likely to cause severe health problems compared to malignant tumors.

On the other hand, malignant tumors exhibit aggressive behavior. They not only invade adjacent tissues but also possess the ability to spread to other parts of the body through the bloodstream or lymphatic system, a process known as metastasis. This invasive quality is what makes malignant tumors more dangerous and challenging to treat, as they can disrupt normal body functions and form secondary tumors in distant organs.

Understanding this distinction is crucial in pathology and oncology, as it influences treatment approaches and patient prognosis.