[Tumor markers--personal experience. How to read time course of some values and tumor marker doubling time].

Tumor marker doubling time is based on essential exponential curve of it. In this paper, we studied significance of tumor marker doubling time about 3 point: 1) time course of values, 2) Cancer growth, 3) Correlation between cancer growth and tumor marker. And we introduce the clinical application of tumor marker doubling time as a evaluation of survival time after chemotherapy, and the easy method of calculation of tumor marker doubling time.