younger than 55 years

Definition of stage II papillary and follicular thyroid cancer (younger than 55 years)
National Cancer Institute

stage II papillary and follicular thyroid cancer (younger than 55 years)

(... PA-pih-LAYR-ee ... fuh-LIH-kyoo-ler THY-royd KAN-ser ...)
The tumor is any size and cancer may have spread to nearby tissues and lymph nodes. Cancer has spread from the thyroid to other parts of the body, such as the lungs or bones.

Source: NCI Dictionary of Cancer Terms