👉 Rachicentesis is a term used in medicine to describe a procedure where a biopsy (a small sample of tissue taken from the surface of a person's body) is performed to diagnose or treat certain medical conditions. Rachicentesis involves taking a small piece of tissue, called a biopsy, and then examining it under a microscope to see if there are any abnormalities or diseases present. The main goal of this procedure is to help doctors understand what is causing the symptoms in an individual's body