Noninvasive

Denoting a procedure that does not require insertion of an instrument or device through the skin or a body orifice for diagnosis or treatment. In cancer, it describes disease that has not spread outside the tissue in which it began.

Nuclear Medicine

The clinical discipline concerned with the diagnostic and theraputic uses of radionuclides (an isotope of artificial or natural origin that exhibits radioactivity), excluding the therapeutic use of sealed radiation sources. Certain imaging procedures, including PET...

Nucleus

The center of the cell containing the genetic information (genes and chromosomes, DNA, etc.). The appearance of the nucleus is used as a criterion to determine the malignant potential of a cell or tissue.

Olfactory Cells

Specialized cells found at the top of the nasal cavity which converts a smell detected by the olfactory hairs into tiny electrical signals. The sense of smell is part of our chemical sensing system, or the chemosenses. Sensory cells in our nose, mouth, and throat have...