Cancer is defined as which of the following?

Cancer is defined as which of the following?

• A. Clouding of the lens
• B. A malignant growth or tumor caused by abnormal and uncontrolled cell division
• C. A slowly progressive decline in mental abilities
• D. A chronic allergic disorder

Answer: (B)

Cancer is a disease of uncontrolled cell growth. In cancer, genetic changes cause cells to divide when they shouldn’t and to ignore signals that normally stop growth or trigger cell death. This leads to a malignant growth or tumor, which can invade nearby tissues and spread to different parts of the body. The option describing a malignant growth or tumor caused by abnormal and uncontrolled cell division captures this idea most accurately. The other choices describe conditions that affect the eye, brain, or immune system and are not cancer.

Cancer is a disease of uncontrolled cell growth. In cancer, genetic changes cause cells to divide when they shouldn’t and to ignore signals that normally stop growth or trigger cell death. This leads to a malignant growth or tumor, which can invade nearby tissues and spread to different parts of the body. The option describing a malignant growth or tumor caused by abnormal and uncontrolled cell division captures this idea most accurately. The other choices describe conditions that affect the eye, brain, or immune system and are not cancer.