How Biopsy Tissue Ushers in A New Era Of Personalized Treatment

https://www.sirius-medical.com/knowledge/breast-biopsy-needle-techniques

In modern oncology, the "one-size-fits-all" treatment model is a thing of the past, replaced by precision medicine based on individual differences. And the starting point for all this is a small breast biopsy needle. The positive changes that occur after a biopsy are first reflected in the fact that it provides the indispensable material foundation for precision medicine-high-quality living tissue samples.

The design of the biopsy needle, particularly its inner diameter (Gauge) and cutting mechanism, directly affects the integrity and quality of the obtained tissue. For example, 14G or 16G core needles can obtain sufficiently large tissue strips for routine pathological diagnosis; while vacuum-assisted excision systems can obtain larger volumes of samples in a single pass, meeting the needs of more complex molecular testing. These precision instruments, made of stainless steel or titanium alloy, ensure that the extracted tissue not only maintains its morphological integrity, but also preserves cell viability. This precious sample is then sent to the laboratory, embarking on a journey of deep exploration from macro to micro, from morphology to molecules.

The second positive event after a biopsy is driving the comprehensive implementation of molecular subtyping. By performing gene sequencing and protein expression analysis on the biopsy tissue, doctors can draw a detailed "portrait" of the tumor. For instance, by detecting hereditary susceptibility genes such as BRCA1/2, the patient's familial genetic risk can be assessed, and preventive screening recommendations can be provided to relatives. Furthermore, through NGS (Next-Generation Sequencing) technology, tumor-specific driver gene mutations, such as PIK3CA and AKT1, can be discovered; these mutation sites themselves are targets for new targeted drugs. This means that an advanced breast cancer patient, after undergoing a biopsy, may gain access to a brand-new, highly effective targeted treatment regimen due to the discovery of a rare mutation, thereby achieving long-term disease control or even reversal.

In addition, biopsy also makes it possible to dynamically monitor treatment response and resistance mechanisms. During treatment, if the tumor progresses or recurs, repeating the biopsy (known as "re-biopsy") becomes crucial. By comparing the molecular profiles of the initial biopsy and the re-biopsy, doctors can clearly see what genetic-level changes the tumor has undergone under drug pressure, thereby determining which resistance mechanism has been activated. Based on this, the treatment strategy can be adjusted in a timely manner, switching to a more effective drug combination. This ability of "real-time monitoring" greatly prolongs the patient's survival and avoids the ongoing harm of ineffective treatments.

In summary, a breast biopsy is by no means an endpoint, but the starting point of the precision medicine journey. It gives us an unprecedented ability to understand the nature of tumors and formulate the most effective, most personalized battle plan accordingly. Every successful biopsy is a solid and positive step toward conquering breast cancer.