IHC results show that KYSE30 cancer cells in both static and dynamic cultures express CD44 (Figure 5A,B), but FFPE-ESCC samples express CD44 on only a select cell population within the tissue biospecimen which weights against cell areas that do not express antibody markers in a semi-quantitative relationship (Figure 5C). Here, CD44 is linked to esophageal squamous cell carcinoma.