Color Doppler ultrasonography allows mapping of flow signals over theentire area of a real time ultrasonographic image and allows assessment of flow in and around benign and malignant breast lesions and axillary nodes. Initial studies using color Doppler ultrasonography to assess breast masses have shown that breast cancers as small as 10 mm are associated with abnormal flow patterns . Material and Methods Our study was based on 50 patients of carcinoma breast and 50 patients of of fibroadenoma. We studied Doppler parameters indices like Peak Systolic Velocity,Peak Diastolic Velocity,Resistivity Index