S-phase fraction

What is S-phase fraction?

S-phase fraction meaning 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.Patients with high S-phase fraction have less favorable prognosis.


reference: national Cancer Institute – Glossary for Registrars

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