For patients with an inconclusive mammogram, what can a diagnostic ultrasound achieve?

For patients with an inconclusive mammogram, what can a diagnostic ultrasound achieve?

• A. Increase the certainty that a lesion is benign
• B. Increase the certainty that a lesion is malignant
• C. Replace mammography entirely
• D. Require biopsy in every case

Answer: (A)

When a screening mammogram is inconclusive, diagnostic ultrasound helps by further characterizing the lesion and distinguishing cystic from solid masses. If the ultrasound shows characteristics strongly consistent with a benign finding—such as a simple, anechoic cyst with thin walls and posterior enhancement, or a solid mass with a smooth, well-circumscribed shape and parallel orientation—the confidence that the lesion is benign increases. This can spare unnecessary biopsies and allow for focused follow-up. Ultrasound cannot fully rule out cancer in every case, and any suspicious features may still require biopsy. It also does not replace mammography entirely, but adds valuable information to reduce uncertainty toward benignity.

When a screening mammogram is inconclusive, diagnostic ultrasound helps by further characterizing the lesion and distinguishing cystic from solid masses. If the ultrasound shows characteristics strongly consistent with a benign finding—such as a simple, anechoic cyst with thin walls and posterior enhancement, or a solid mass with a smooth, well-circumscribed shape and parallel orientation—the confidence that the lesion is benign increases. This can spare unnecessary biopsies and allow for focused follow-up. Ultrasound cannot fully rule out cancer in every case, and any suspicious features may still require biopsy. It also does not replace mammography entirely, but adds valuable information to reduce uncertainty toward benignity.