Sep 19, 2019 · Other older studies have looked at growth rate via serial mammograms, with widely varying results. Overall, the average doubling time of breast cancer was 212 days but ranged from 44 days to 1800 days.
Doubling times for primary breast cancer ranged from 44 to more than 1,800 days, with a mean of 212 days. Metastatic lesions may have a slightly faster average rate of growth than primary tumors. Metastatic lesions may have a slightly faster average rate of growth than primary tumors.
The average doubling time for most breast cancer tumors is in the range of 50 to 200 days. The change of the first normal cell into a malignant cell happens years before any evidence of cancer can be detected by any tests that we have today.