MKI67 and neoplasm: Statistical analysis between CTC number in PreS samples and all ACC clinical parameters of ACC (stage, tumor diameter, secretion, Weiss score, stage, number of mitosis, Ki67%) showed a significant positive correlation only with the Weiss score (R = 0.537, p = 0.032) and with the metastatic stage IV (R = 0.517, p = 0.028).