To observe the correlation between drug sensitivity in vitro and clinical response of patients with ovarian cancer treated with cisplatin. Methods: The MTT colorimetric assay of agar culture was used to test the chemosensitivity of 26 fresh ovarian cancer samples. Therapeutic effect of cisplatin on the 26 patients with ovarian cancer was also abserved. Results: Linear regression analysis comparing the results of OD versus viable cells of ovarian cancer plated revealed excellent correlations (r=0.9728, P