CD44 and neoplasm: Kaplan-Meier analysis showed that the presence of CD44+/CD24-/low tumor cells was significantly associated with shorter DFS compared with the absence of CD44+/CD24-/low tumor cells (22.9 ± 2.2 months versus 35.9 ± 3.8 months; Pearson chi-square, 10.696, p = 0.001; Figure 2A).