For S-phase Fraction we have terms and definitions in 3 topics. The topics are Breast Cancer, Cancer and Legal, Mesothelioma.

The measure of the number of cells dividing at any time, indicating how fast a tumor is growing.
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A measure of the percentage of cells in a tumor that are in the phase of the cell cycle during which DNA is synthesized. The S-phase fraction may be used with the proliferative index to give a more complete understanding of how fast a tumor is growing.
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(SPF) the percentage of cells that are replicating their DNA. DNA replication usually means that a cell is getting ready to split into two new cells. A low SPF is a sign that a tumor is slow-growing; a high SPF shows that the cells are dividing rapidly and the tumor is growing quickly.
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