Large adenoma.

A variation in the magnetic field with respect to position.

MRI is a scanning device that uses a magnetic field, radio waves, and a computer.

In reference to an abnormal tissue growth neoplasm (cancer), having the property of locally invasive and destructive growth and metastasis (spreading).

Imaging examination of the breast by means of x-rays

Damage to the brain due to the bulk of a tumor, the blockage of fluid, or excess accumulation of fluid within the skull.

The word medial comes from the Latin medialis, from medius, meaning the middle. Medial is the adjective corresponding to the noun median, as in the median in a highway.

Median means the middle value.

A semi-synthetic medication which is close in structure and function to the naturally occurring female sex hormone, progesterone.

Thin layer of tissue covering a surface, lining a body cavity, or dividing a space or organ.

Any membrane; specifically, one of the membranous coverings of the brain and spinal cord.

The spread of a disease process from one part of the body to another.

Small adenoma.

Using an operating microscope to better visualize a small operating field or perform delicate surgery.

One-thousandth of a roentgen.