A liquid biopsy is a minimally invasive test that analyzes biological fluids, such as blood, to detect cancer-related information. Unlike traditional biopsies, which require tissue samples from tumors, liquid biopsies can identify circulating tumor cells or fragments of tumor DNA, providing insights into the presence and characteristics of cancer. These tests are valuable for monitoring treatment response and detecting cancer recurrence. Liquid biopsies can also help personalize treatment plans by identifying specific genetic mutations in tumors, allowing for targeted therapies. This approach is gaining popularity due to its convenience and ability to provide real-time information about a patient's condition.