S phase analysis

S phase analysis

Lab medicine Analysis of the S phase fraction or index–SPF of cells during the cell cycle, which corresponds to the rate of tumor cell proliferation; it is measured by flow cytometry–eg, in a 'work-up' for certain malignancies. See Ki-67, Mitotic activity.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.