ABSTRACT
Tumors or cancers are insidious diseases that result from uncontrolled growth of abnormal cells in one or more parts of the body. The human body is composed of various types of cells that grow, divide, and die in an orderly fashion. Tumors and cancers are usually named for the organs or tissues in which they originate. Because most tumors and cancers tend to induce nonspecific, noncharacteristic clinical signs, a variety of procedures and tests are employed during diagnostic work-up. The outcomes of tumor and cancer treatment include cure, remission and recurrence. Tumors and cancers are a biologically complex disease that is expected to surpass heart disease to become the leading cause of human death throughout the world in the coming decades. The most commonly used imaging techniques include magnetic resonance imaging (MRI), computed tomography (CT) scan, positron emission tomography (PET) scan, and ultrasound.
