NANOG and cancer: Nanog has also been proposed as a prognostic marker in various types of cancers, including non–small cell lung cancer [19], oral squamous cell carcinoma [20,21], ovarian tumors [22], urothelial carcinoma [23], glioblastoma [24,25], gastrointestinal cancer [26], colorectal cancer [27], and breast carcinoma [28].