Biopsy risks and complications vary depending on the type of biopsy, type of anesthesia, and your general health. Any time general anesthesia is administered, there are certain risks, such as breathing problems. However, the risk of complications is very low. Surgical procedures also carry of risk of bleeding. General risks of surgery Other risks of surgery include: Adverse reaction to anesthesia Blood clot, in particular a deep vein thrombosis developing in your leg or pelvis and traveling to your lungs, where it could result in pulmonary embolism. Infection Potential complications of biopsy The vast majority of biopsies proceed without incident, but potential complications can happen. These include: Excessive bleeding, bruising and/or pain at the site of the incision or needle insertion Localized infection at the biopsy site Collapsed lung (pneumothorax), which can occur during lung biopsy Scarring at the biopsy site Reducing our risk of complications You can reduce your risk of complications by: Following recommendations before your surgery and during recovery concerning what to eat or drink, what medications to take, and what type of activity is safe Provide a list of all medications you are taking including prescriptions, over-the-counter drugs, and herbal pills, teas, oils or other supplements; blood thinners like Coumadin and aspirin are especially important to notify your care team about beforehand Telling all members of your care team if you have allergies to medications, latex, iodine, tape, anesthetics or other substances Notifying your doctor immediately about any problems after the procedure, such as bleeding, fever, or increase in pain