Understanding Diagnostic Mammograms & Ultrasounds: What to Expect

Why You Were Referred

A diagnostic mammogram/ultrasound is ordered when a screening mammogram shows an abnormality, or you have a symptom (lump, pain, nipple discharge). It does not mean you have cancer. Most callbacks are benign.

Diagnostic Mammogram

• Targeted X-ray views (spot compression, magnification) of the area of concern.
• More detailed than screening; may take 30–60 minutes.
• Radiologist often reviews images real-time.

Breast Ultrasound

• Uses sound waves (no radiation) to distinguish solid masses from cysts.
• Guides biopsy if needed.
• Excellent for dense breast tissue.

Possible Outcomes

• BI-RADS 1/2: Benign/negative – return to routine screening.
• BI-RADS 3: Probably benign – short-interval follow-up (6 months).
• BI-RADS 4/5: Suspicious – biopsy recommended.
• BI-RADS 0: Incomplete – need additional imaging (e.g., MRI).

What to Do

• Bring prior mammograms for comparison.
• Ask the radiologist to explain findings before you leave.
• Follow up on all recommendations.
• Remember: 80% of biopsies are benign.