For figure 6A, which compares docetaxel treated and naive, the N is 46 for naive and about 25% of these show no change through 400 days, so it is on the order of 10 patients. A small sample size to be sure, but not 1 or 2. Were you referring to Figure 6B, the discontinuation part?
No, it was 1 patient who represented 24% of the trial arm. The other "9" were censored (I assume because of time).
Take a look at how K/M charts work (wiki will do it).