Breast Biopsy — Core Needle & Vacuum-Assisted
Breast biopsies at Epoch Medical Imaging, St Ives. Core needle and vacuum-assisted biopsy with expert reporting. Serving the North Shore — Turramurra, Pymble, Gordon.
When Is a Breast Biopsy Recommended After a Mammogram or Ultrasound?
A breast biopsy is recommended when a breast imaging investigation — a mammogram, ultrasound, or breast MRI — identifies a finding that cannot be confidently classified as benign based on imaging alone and requires tissue examination for definitive characterisation.
Situations that typically lead to a breast biopsy recommendation:
– A BI-RADS 4 (suspicious) or BI-RADS 5 (highly suggestive) finding on mammogram, ultrasound, or MRI
– A solid mass with irregular margins, internal echoes, or other features associated with a higher likelihood of concern
– A cluster of microcalcifications on mammogram that requires tissue assessment
– An area of architectural distortion — where the normal breast tissue pattern is disrupted
– A change in a previously stable lesion over serial imaging
A recommendation for biopsy does not mean a diagnosis of cancer — it means the imaging team needs tissue to confirm what the finding is. The majority of breast biopsies return benign results, providing patients with the clear answer they need. At Epoch Medical Imaging in St Ives, breast biopsies are performed by specialist radiologists under ultrasound guidance with results sent to your referring GP or specialist.
Core Needle vs Vacuum-Assisted Breast Biopsy: What's the Difference?
Two main biopsy techniques are used for breast tissue sampling — the choice depends on the nature and size of the finding and the type of tissue assessment required.
Core needle biopsy (CNB):
– A spring-loaded cutting needle (typically 14 gauge) takes multiple small cylinders of tissue from the target area.
– Performed under ultrasound guidance with local anaesthetic.
– Provides excellent tissue samples for histological analysis in most breast lesion types.
– Takes approximately 20 to 30 minutes including preparation.
– Small adhesive dressing applied afterwards — no sutures required.
Vacuum-assisted biopsy (VAB):
– A specialised vacuum-assisted device removes larger, contiguous tissue samples — providing more tissue than a standard core needle.
– Particularly useful for microcalcifications, subtle lesions, or cases where larger tissue volume improves diagnostic accuracy.
– May be performed under ultrasound or stereotactic (mammography) guidance.
– Slightly longer procedure — approximately 30 to 45 minutes.
– A tiny titanium marker clip is often placed at the biopsy site to identify the location on future imaging.
Your specialist radiologist will recommend the most appropriate technique based on your specific imaging finding.
What to Expect During Your Breast Biopsy at Epoch
A breast biopsy at Epoch Medical Imaging is performed with care for both clinical accuracy and patient comfort — our specialist radiologists are experienced in making the procedure as smooth as possible.
Step by step:
1. You lie on your back or side, depending on the lesion location — the area is positioned for optimal access under ultrasound.
2. The skin is cleaned with antiseptic and a generous local anaesthetic is injected — the anaesthetic may cause a brief sting and then the area becomes fully numb.
3. A small nick in the skin (2 to 3 mm) allows the biopsy needle to be introduced without requiring a suture afterwards.
4. Under continuous ultrasound guidance, the needle is advanced to the target lesion and multiple tissue cores are obtained. You may hear clicking sounds from the biopsy device — this is normal.
5. A small titanium marker clip may be placed at the biopsy site — this is standard practice and harmless, making the site identifiable on future imaging.
6. Firm pressure is applied for several minutes, and a small adhesive dressing is applied.
7. The total appointment takes approximately 30 to 45 minutes. You can go home immediately.
Most patients describe a breast biopsy as significantly less uncomfortable than anticipated, with local anaesthetic making the procedure well-tolerated.
Understanding Your Breast Biopsy Pathology Results
Breast biopsy pathology results are reported by specialist pathologists and sent to your referring GP or breast specialist — who will discuss the findings with you and advise on the recommended next steps.
What your results may show:
Benign results (most common):
– Fibroadenoma — a common benign breast tumour, no treatment required
– Fibrocystic change — benign architectural change, monitoring as appropriate
– Fat necrosis — benign change, often from previous trauma or surgery
– Benign calcifications — requiring no further action
Intermediate results:
– Atypical ductal or lobular hyperplasia — abnormal but not malignant cells; surgical consultation is typically recommended
– Flat epithelial atypia — similar intermediate category; management discussed with breast specialist
Malignant results:
– Invasive breast carcinoma or DCIS (ductal carcinoma in situ) — requiring specialist breast surgery referral and oncology planning
The vast majority of breast biopsies return benign results — providing patients with clarity and peace of mind. When a malignant result is found, the biopsy has done its most important job: identifying the problem early, when treatment options are greatest.
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