NCI Dictionary of Cancer Terms

The NCI Dictionary of Cancer Terms features 8,390 terms related to cancer and medicine.

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stage IVA anaplastic thyroid cancer
(... A-nuh-PLAS-tik THY-royd KAN-ser)
Stage IV is divided into stages IVA, IVB, and IVC. In stage IVA, cancer is found in the thyroid only and the tumor may be any size.