Fine Needle Aspiration Cytology (FNAC) is a diagnostic procedure used to obtain cells from a specific area in the body using a thin, hollow needle. This minimally invasive technique helps in diagnosing and evaluating a range of conditions, including tumors, cysts, and infections, by examining the extracted cells under a microscope. FNAC is often preferred for its simplicity, speed, and minimal discomfort. Patients should consider FNAC when there are abnormalities detected through imaging or physical examination, or when further investigation of a suspicious mass is needed.