Cancer Dictionary – F

Back to Index

false-negative test result A test result that indicates that a person does not have a specific disease or condition when the person actually does have the disease or condition.

false-positive test result (fawls-PAH-zih-tiv … reh-ZULT) A test result that indicates that a person has a specific disease or condition when the person actually does not have the disease or condition.

fibrosis The growth of fibrous tissue.

flow cytometry A method of measuring the number of cells in a sample, the percentage of live cells in a sample, and certain characteristics of cells, such as size, shape, and the presence of tumor markers on the cell surface. The cells are stained with a light-sensitive dye, placed in a fluid, and passed in a stream before a laser or other type of light. The measurements are based on how the light-sensitive dye reacts to the light.

Back to Index