Colorectal cancer is the term for cancer of the colon (large intestine) or rectum. The primary goal of colorectal cancer screening is to prevent deaths from colorectal cancer. Screening tests can help identify cancers at an early and potentially curable stage.

The thyroid is a butterfly-shaped gland in the middle of the neck, located below the larynx (voice box) and above the clavicles (collarbones). Thyroid nodules are round or oval-shaped areas within the thyroid that can be caused by a number of conditions, most of which are not serious.