Question

select the correct answer.
what are malignant tumors?
a. tumors that grow slowly and do not spread from their original site
b. tumors that grow fast and spread to neighboring tissues
c. tumors that start in blood - forming tissue and produce abnormal blood cells

Explanation:

• Option A describes benign tumors (slow - growing, non - spreading).
• Option B: Malignant tumors are characterized by rapid growth and the ability to invade (spread to) neighboring tissues (and can also metastasize to distant sites).
• Option C describes leukemia (a type of cancer of blood - forming tissues), not the general definition of malignant tumors.

Answer:

B. tumors that grow fast and spread to neighboring tissues