1Section of Abdominal Ultrasound, Kobe City General Hospital, 2The First Department of Surgery, Kobe City General Hospital, 3The Second Department of Surgery, Kobe City General Hospital
Color Doppler echography, Tumor vessel, Breast disease
A color Doppler echography was performed on 116 patients with 120 breast tumors; 45 of which were benign, and 75 of which were malignant masses. The detection rate of color flow signals within the lesions, and the spectrum and maximum velocity of flow signals were evaluated. The detection rate of color flow signals in the malignant tumors (85.3%) was significantly higher than (40.0%) in the benign masses. As the size of the tumor became greater, the detection rate of the color flow signals in both the benign and malignant lesions increased. The detection rate of color flow signals in the lesions bigger than 21 mm was 92.9% for benign tumors and 97.7% for malignant tumors, respectively. In contrast, the detection rate of the color flow signals in lesions smaller than 20 mm was 16.1% for benign tumors, and 68.8% for malignant tumors. No color flow signals were detected in any of the 13 cases with a mastopathy smaller than 20 mm. The maximum velocity of the blood flow signals was relatively higher in malignant tumors than in benign tumors although the difference was not statistically significant. Pulsatile waves were observed in all the cases measured; however, an additional continuous wave was obtained in four benign tumors and three malignant tumors. To conclude, color Doppler echography is considered to be useful in the differential diagnosis of breast lesions smaller than 20 mm.