Ultrasound evaluation of breast cysts is the modality of choice. Obstruction of the ducts, often appearing as the result of epithelial hyperplastic processes or stromal fibrosis, or both processes lead to the formation of cysts, disabling the drainage of the terminal ducts of the lobules. Breast ultrasound can image several different types of breast conditions, including both benign (non-cancerous) and malignant (cancerous) lesions. Ultrasound is frequently used to evaluate breast abnormalities that are found with screening mammography or diagnostic mammography or during a physician performed clinical breast exam. Its often used in addition to mammography to tell whether a lump in a breast is a cyst (a fluid-filled sac) or a solid mass, which might be cancer. if the cyst comes back, it may be evaluated again with mammogram and ultrasound, and it can be drained again. Most women with simple cysts go back to routine breast cancer screening. A breast ultrasound can provide evidence about whether the lump is a solid mass, a cyst filled with fluid, or a combination of the two. While cysts are typically not cancerous, a solid lump may be a cancerous tumor. Healthcare professionals also use this diagnostic method to help measure the exact size and location of the lump and get a closer. a breast cyst is an accumulation of fluid within the breast, often resulting in a breast lump that you can feel. If you find any breast lump, whether you think it is a cyst or not, it is essential to consult your health care provider as soon as possible. About 25 of breast cysts enlarge gradually into big-enough cysts to become a palpable breast lump. A breast ultrasound scan is a test that uses high frequency sound waves to create a picture of the inside of the breast. ultrasound imaging of the breast lesion characterization. Breast ultrasound is considered the best option when diagnosing breast cysts because it is 95 to 100 accurate, it provides a clear image on the cysts appearance (simple or complex) and it may also distinguish between solid lumps and fluid-filled cysts, which a mammogram cannot do.