An ultrasound of the breast is performed when we need to 'look' for different abnormalities of the breast. For example, it is superior when trying to determine whether some lesion is cystic or solid. By performing Doppler study, we may also be able to determine if there is any abnormal blood flow to the lesion, and aid in the diagnosis of lesions in the breast. For some women this is required after a mammogram has shown a lesion which is suspicious, for others this maybe the preferred modality for examination. Ultrasound guided biopsy can also be performed if indicated. Uniquely, The Women's Clinic can perform this under 4D guidance with our state of the art Kretz machine.