MKI67 and cancer: To evaluate a clinical relevance of Elovl5 expression in human breast tumor growth, we determined the breast tumoral zone with the lowest and with the highest Elovl5 H-score for each patient, and we found that cancer cell proliferation analyzed by a Ki67 H-score is positively correlated with Elovl5 H-score in the corresponding breast tumor lesion (Fig. 2L).