Needle aspiration biopsy, also known as fine needle aspiration or FNA, is a minimally invasive diagnostic procedure used to extract cell samples from lesions or masses in the body. Other synonyms for needle aspiration biopsy include fine needle biopsy, needle biopsy, and cytology biopsy. This procedure involves inserting a thin needle into the area of concern and aspirating a small sample of cells, which are then examined under a microscope. Needle aspiration biopsy is often used to diagnose various types of cancer, infections, and other medical conditions. The procedure is generally safe, relatively quick, and requires little recovery time.