PATHOLOGY

Detailed explanation-1: -An abnormal mass of tissue that forms when cells grow and divide more than they should or do not die when they should. Tumors may be benign (not cancer) or malignant (cancer). Benign tumors may grow large but do not spread into, or invade, nearby tissues or other parts of the body.

Detailed explanation-2: -The Definition of Cancer When cells grow old or become damaged, they die, and new cells take their place. Sometimes this orderly process breaks down, and abnormal or damaged cells grow and multiply when they shouldn’t. These cells may form tumors, which are lumps of tissue.

Detailed explanation-3: -The National Cancer Institute defines a tumor as “an abnormal mass of tissue that results when cells divide more than they should or do not die when they should.” Tumors can vary in size from a tiny nodule to a large mass, depending on the type, and they can appear almost anywhere in the body.

Detailed explanation-4: -In medicine, a lump in the body. It may be caused by the abnormal growth of cells, a cyst, hormonal changes, or an immune reaction. A mass may be benign (not cancer) or malignant (cancer).