Overview
In oncology, molecular and genetic testing involves advanced laboratory techniques to analyse tumour tissue or blood samples to detect specific genetic mutations, biomarkers, or molecular changes linked to cancer. These tests examine DNA, RNA, or proteins instead of just how cells look under a microscope, which is what traditional biopsy analysis does. This helps scientists learn more about how a tumour behaves biologically. Next-generation sequencing (NGS), polymerase chain reaction (PCR), or liquid biopsy using blood samples are some of the methods that can be used. Molecular and genetic testing are very important for personalised medicine because they help doctors choose the best treatment for each person's cancer.
Why It’s Done
This testing is done to identify mutations or molecular markers that can help with targeted therapy, immunotherapy, or other precision treatments. It helps determine prognosis, estimate how well treatment will work, and identify whether someone is resistant to certain drugs. Genetic testing can also find out if you have a higher risk of getting cancer because of your genes. The goal is to choose the best, most personalised treatment plan while avoiding unnecessary treatments.
What to Expect?
If a sample of tumour tissue isn't already available, patients may need to have a biopsy before the test. In some cases, a blood sample is all that is needed for a liquid biopsy. Most of the time, the collection process is easy and doesn't hurt too much. After the sample is collected, it is sent to a lab that specialises in detailed analysis. Depending on how complicated the tests are, it could take a few days to a few weeks to get results. Doctors look over the patient's medical history and imaging results during this time. Once the results are in, the oncology team discusses the findings with the patient and suggests treatment options based on the genetic changes or biomarkers identified. If hereditary mutations are found, more counselling may be offered.
Recovery & Outlook
There is no need for physical recovery beyond the usual sample collection. Molecular and genetic testing make treatment much more accurate and effective. It makes cancer care more effective by helping doctors make personalised therapy decisions and supporting more targeted, evidence-based care.