CD44 and neoplasm: The necrotic fraction of tumor slices (49.5 ± 7.9%) correlated negatively with depth in the tissue (Pearson correlation R = −0.88, p < 0.01), CD44 expression (R = −0.61, p = 0.02) and the DAPI-positive area (R = −0.71, p < 0.01).