How are malignant tumors different from benign tumors?

• A. Malignant tumors are always smaller than benign tumors.
• B. Malignant tumors invade surrounding tissues and can metastasize, while benign tumors do not.
• C. Malignant tumors are less likely to cause symptoms than benign tumors.
• D. Benign tumors are more likely to recur after removal than malignant tumors.

Answer: (B)

Verified step by step guidance

1. Understand the basic definitions: A tumor is an abnormal growth of cells. Tumors can be classified as benign or malignant based on their behavior and potential to cause harm.
2. Recognize the characteristics of benign tumors: Benign tumors are non-cancerous growths that do not invade surrounding tissues or spread to other parts of the body. They are usually encapsulated and grow slowly.
3. Identify the characteristics of malignant tumors: Malignant tumors are cancerous and have the ability to invade nearby tissues and spread to distant parts of the body through a process called metastasis. They tend to grow more rapidly and are not encapsulated.
4. Compare the potential for metastasis: Malignant tumors can metastasize, meaning they can spread to other parts of the body through the bloodstream or lymphatic system. Benign tumors do not have this capability.
5. Consider the implications for treatment and recurrence: Benign tumors are generally easier to remove surgically and are less likely to recur after removal. Malignant tumors may require more aggressive treatment, including surgery, chemotherapy, or radiation, and have a higher risk of recurrence.