Magnetic resonance imaging: Imaging method using powerful magnetic energy to visualize internal organs of the body. Synonym: MRI.
Malignant: 1. Tending to be severe and become progressively worse, as in malignant hypertension. 2. In regard to a tumor, having the properties of a malignancy that can invade and destroy nearby tissue and that may spread (metastasize) to other parts of the body.
Metastasize: Spread beyond the organ of origin, usually through the blood channels or lymphatics. Example: prostate cancer metastasizes to pelvic lymph nodes and bone.
Microvessel: Small blood vessel that nourishes cells. Example: the number and density of microvessels surrounding prostate cancer is increased when compared with benign prostatic tissue.
MRI: Imaging method using powerful magnetic energy to visualize internal organs of the body. Synonym: Magnetic resonance imaging.