Christopher Silveri MD

Christopher P. Silveri, M.D.FAAOS

Board Certified Orthopaedic Surgeon : Spine View Profile
  • I would like to express my sincere appreciation for keeping me up and running. By - Martha Howar

  • After suffering back pain for over 50 years the pain it became unbearable. By - Bob Vandel

  • Dr Silveri performed the first case using the O-Arm 3-D Imaging at Fair Oaks Hospital. Exciting New Technology

  • Thanks for the GREAT WORK! Double Fusion Feb 4, 2003 MARATHON October 30, 2005 By - Tim Bergen

  • Ballroom Dancer Fully Recovers from Back Surgery,A Laminectomy and Three Vertebra Fusion By - Tom Woll

  • Thanks Dr. Silveri.

  • Washingtonian Magazine 2019 Top Spine Surgeon

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Piriformis Muscle Injection

The piriformis muscle is present in the buttocks, connecting the sacrum to the outer surface of the hip. This muscle enables us to walk and run. The sciatic nerve is a thick, long nerve passing through or below the piriformis muscle. A spasm of the piriformis muscle can compress the sciatic nerve resulting in severe pain (sciatica).  The pain is usually felt over the buttocks but may radiate to the back of the thigh and down the leg as well.

A piriformis muscle injection is used to alleviate the spasm and pain in these patients. The injection comprises an anesthetic and a steroid to reduce the spasm. In most patients, the pain resolves with 1 or 2 injections, however, 3 injections may be required to achieve complete benefit.


The entire procedure usually takes 15-20 minutes. You will lie on your stomach. A local anesthetic is used to numb the area of injection. Your doctor will insert the needle into the piriformis muscle under fluoroscopic guidance. A small amount of contrast dye is injected to guide the doctor in proper placement of the needle. After confirming the position of the needle, a steroid-anesthetic mix is injected into the piriformis muscle. After injecting the medication, the needle is removed, and the injection site is covered with a band-aid.

After the Procedure

Following the procedure, you may experience nausea, sweating, and/or dizziness. You may also develop weakness or numbness in the leg for a few hours. You may also notice a slight swelling, redness, bruising, and tenderness at the injection site, which may subside within a short period of time. Once the physician has confirmed that you are stable, you will be discharged to go home. Additional instructions and a follow-up appointment will be given to you at the time of your discharge.

  • Penn Medicine
  • American  Association of Orthopaedic Surgeons
  •  American Board of Orthopaedic Surgery
  • North American Spine Society
  • Georgetown University