Two studies conducted by Abraham et al. [22] and Mylona et al. [23] using double-staining immunohistochemistry have examined the presence of CD44+/CD24− tumor cells in a breast cancer specimen and reported frequencies ranging between 0 and 80%, and these results were in agreement with our study that showed 42% prevalence of CD44+/CD24− tumor cells. Here, CD44 is linked to breast cancer.