Ki-67 is a protein found inside cells that are actively dividing. Because cancer cells divide more frequently than normal cells, measuring Ki-67 gives pathologists a way to estimate how quickly a breast cancer is growing. The result is expressed as a percentage — the proportion of cancer cells in active division at the time the …
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The Ki-67 labeling index is a number that tells doctors what percentage of cells in a tissue sample are actively dividing. It is based on a test for Ki-67, a protein that appears in the nucleus of cells when they prepare to divide. Cells that are resting and not dividing do not show Ki-67. By …
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Ki-67 is a protein found in the nucleus, which is the control center of every cell. This protein only appears when a cell is preparing to divide and make new cells. Cells that are resting and not dividing do not show Ki-67. As a result, Ki-67 is regarded as a marker of cell growth and …
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