telomere shortening was rapid in the blood cells leading up until a few years before cancer diagnosis. In those years before diagnosis, the telomere lengths appeared to stabilize.
Men who developed cancers were compared with those that didn’t for the 13 years prior to diagnosis or exclusion by using a quantitative PCR measurement (which is problematic). Firstly, they found was two different curves with the cancer group showing a more rapid shortening trend. This is consistent with my stem cell theory of aging and most of the extant studies.