Breast Biopsy Needle Types Based On Puncture Methods—The Logic And Trends Of Clinical Choice

https://www.mayoclinic.org/tests-procedures/breast-biopsy/about/pac-20384812

In the diagnostic pathway for breast diseases, the choice of breast biopsy needle type directly determines sampling efficiency, pathological accuracy, and patient experience. Classified by puncture method, the mainstream breast biopsy needle types currently include: fine-needle aspiration biopsy (FNA), core needle biopsy (CNB), vacuum-assisted biopsy (VAB), and surgical incision biopsy. Behind each puncture method lies a balance between histological information, procedural trauma, and clinical indications.

Fine-needle aspiration biopsy needles typically use an ultra-fine 21–25G gauge, relying on negative pressure to aspirate cells, resulting in minimal trauma and making them suitable for rapid initial screening of superficial, palpable masses. However, their limitation lies in obtaining only cytological specimens, making it difficult to determine tumor tissue structure; therefore, they are currently mostly used for auxiliary screening in clinical practice.

Core needle biopsy is currently the most commonly used type in outpatient clinics, typically 14–16G ​​in size. It obtains strip-shaped tissue samples via spring-driven or manual firing. This type of breast biopsy needle offers significant advantages in obtaining histological structures, meeting the needs of immunohistochemistry and some molecular testing, and requires no sutures, making it the preferred minimally invasive method for BI-RADS 4 lesions.

Vacuum-assisted biopsy needles represent a more advanced sampling technique. Their typical feature is the establishment of continuous negative pressure at the side hole of the needle, allowing for multiple excisions with a single insertion. This type of breast biopsy needle is particularly suitable for small calcifications, non-palpable lesions, and MRI-guided biopsies, significantly improving specimen integrity and positive detection rates, and is an important tool for current stereotactic biopsy.

While surgical incision biopsy is not strictly speaking a percutaneous puncture device, it remains irreplaceable in certain complex cases. It is more often used as a last resort for diagnosis than a first-line biopsy method.

From a developmental perspective, breast biopsy needles are evolving towards being "finer, smarter, and safer." For example, the widespread adoption of coaxial biopsy needle systems allows for multiple samplings to be performed with only a single puncture, significantly reducing pain and the risk of complications. Furthermore, biopsy needles with marking capabilities can leave metallic or bioabsorbable markers during sampling, providing a basis for subsequent surgical localization.

For physicians, understanding the different types of breast biopsy needles used with various puncture methods helps in developing personalized treatment plans based on the location, size, and nature of the lesion; for patients, the appropriate needle type means less trauma and more accurate diagnosis. In the future, with the deep integration of image-guided technology and biopsy needle design, breast biopsy will enter a new stage of greater precision and comfort.