MKI67 and neoplasm: Variables with p-values <0.2 were age (P=0.04), BMI (P=0.02), PR status (P=0.15), Ki67 (P=0.04), tumor size (P<0.001), inner echo of tumor (P=0.09), tumor calcification (P<0.001), color Doppler flow (P=0.17), and aspect ratio (P<0.001).