Stages of Pituitary Tumors
Key Points for This Section
Once a pituitary tumor has been diagnosed, tests are done to find out if it has spread within the central nervous system (brain and spinal cord) or to other parts of the body.
The extent or spread of cancer is usually described as stages. There is no standard staging system for pituitary tumors. Once a pituitary tumor is found, tests are done to find out if the tumor has spread into the brain or to other parts of the body. The following test may be used:
- MRI (magnetic resonance imaging): A procedure that uses a magnet, radio waves, and a computer to make a series of detailed pictures of areas inside the body. This procedure is also called nuclear magnetic resonance imaging (NMRI).
Pituitary tumors are described in several ways.
The following sizes are used:
- Microadenoma: The tumor is smaller than 1 centimeter.
- Macroadenoma: The tumor is 1 centimeter or larger.
Most pituitary adenomas are microadenomas.