Breast Ultrasound: What It Checks and How It Differs from Mammography
- Youwanush Kongdan
- May 25
- 3 min read
Breast ultrasound is an imaging test that uses high-frequency sound waves. It does not use ionizing radiation. Ultrasound is commonly used to evaluate a lump or abnormal area in the breast, help distinguish a cyst from a solid mass, and complement mammography in many situations, especially for patients with dense breast tissue or breast symptoms. This article explains what breast ultrasound can detect, who may need it, and how it differs from mammography.
What is breast ultrasound?
Breast ultrasound uses a handheld probe to send sound waves through the skin and create images from the returning echoes. It shows breast structures in real time and does not use radiation. It can be used in many patient groups, including pregnant patients when there is a medical indication.
What can breast ultrasound evaluate?
· Help distinguish a cyst from a solid breast mass.
· Evaluate a palpable lump or an abnormal area seen on mammography.
· Assess the margin, shape, orientation, and suspicious features of a mass using standardized reporting systems such as BI-RADS.
· Guide a needle during biopsy so that the tissue sample is taken from the correct location.
· Evaluate axillary lymph nodes when clinically indicated.
How is ultrasound different from mammography?
Mammography uses low-dose X-rays and is the main screening tool for breast cancer in appropriate age groups. It is especially useful for detecting tiny calcium deposits, called microcalcifications, which may be an early sign of some breast cancers. Ultrasound is especially useful for evaluating lumps, cysts, and tissue characteristics in real time. In many cases, these tests are complementary rather than interchangeable.
Who may benefit from breast ultrasound?
· Patients who feel a lump or have a localized symptom such as focal pain or a specific abnormal area that needs further evaluation.
· Patients whose mammogram shows an abnormality that requires additional imaging.
· Patients with dense breast tissue, which can make mammograms harder to interpret.
· Pregnant or breastfeeding patients who have breast symptoms or a clinical indication for imaging.
· Younger women with a breast lump, as younger patients often have denser breast tissue.
Preparation and examination process
In general, no special preparation is required. Gel is applied to the skin, and the probe is moved over the area being examined. The test is usually not painful and does not take long. The radiologist’s report and the treating doctor’s plan should be used to guide next steps.
Frequently Asked Questions (FAQ)
Can breast ultrasound replace mammography?
In general, it should not replace mammography. Mammography remains the main screening test for appropriate age groups, while ultrasound is an additional test used when there is an indication.
Is breast ultrasound painful or does it use radiation?
It is usually not painful and does not use ionizing radiation. It uses sound waves.
What does dense breast tissue mean, and why might extra imaging be needed?
Dense breast tissue contains more glandular or fibrous tissue than fatty tissue. This can make mammograms harder to read and may be associated with a somewhat higher breast cancer risk. Doctors may recommend additional imaging based on individual risk.
How often should I have breast ultrasound?
The frequency depends on age, symptoms, previous imaging results, breast density, and personal risk. It is not a routine test required for everyone.
Can ultrasound tell whether a lump is cancer?
Ultrasound can show whether a lump has suspicious features, but a biopsy and pathology examination are needed to confirm cancer.
Clinically reviewed by: Assoc. Prof. Youwanush Kongdan, MD, and the breast surgery team, Namarak Hospital.
Disclaimer: This information is intended for general patient education only. It is not a substitute for personalized medical advice. Diagnosis and treatment decisions should be made by a doctor based on each patient’s individual condition.
Comments