CD44 and neoplasm: Tumor growth was clearly observed in control BALB/c nu/nu mice inoculated with the CD44− SK-LMS-1 subclone (normal human LMS subclone cell) fraction; however, no reduction in tumor growth was observed in BALB/c nu/nu mice inoculated with the CD44+ SK-LMS-1 subclone (human LMS stem-like cells) (Figure 2, Supplementary Material Table S1).