Figure 3: Distribution of DNA index histograms in four increasing SSI intervals. (a) In the SSI interval ≤8.8, D-type tumors predominate and there are some T-type tumors. (b-c) After a temporary enhanced T-type population in 8.8<SSI ≤ 12 and 12<SSI ≤ 15, A-type tumors dominate in 15<SSI ≤ 40 (d). The mean tumor size in the four SSI intervals was (in mm) (a) 19.0 ± 13.3, (b) 20.9 ± 15.6, (c) 17.5 ± 8.5, and (d) 21.1 ± 12.2.