What is Quadrilateral Space Syndrome (QSS)?

Quadrilateral Space Syndrome (QSS) is a rare condition that occurs when the axillary nerve and/or the posterior circumflex humeral artery get squeezed or compressed as they pass through a small area in the back of your shoulder called the 'quadrilateral space.' This compression can lead to pain, numbness, tingling, and weakness in your arm.

QSS is often caused by repetitive overhead activities, common in athletes like throwers, swimmers, and tennis players. It can also result from repeated motions that narrow the space (overuse), extra bands of tissue that can form and compress the nerve or artery (fibrous bands), trauma or injury such as a shoulder dislocation or a direct blow to the shoulder which can cause swelling or scar tissue, or muscle enlargement if muscles in the area grow significantly (e.g., in bodybuilders), they can crowd the space.

What are the common symptoms of QSS?

Symptoms typically include vague pain or a dull ache in the back of the shoulder, sometimes radiating down the arm; numbness, tingling, or a 'pins and needles' sensation in the shoulder and upper arm; pain that worsens with overhead movements or when your arm is in a 'throwing' position; tenderness when pressure is applied over the back of the shoulder in the quadrilateral space; weakness or fatigue in the arm, especially when lifting or rotating it; and sometimes, shrinking (atrophy) of certain shoulder muscles like the teres minor or deltoid.

How is QSS diagnosed?

Diagnosing QSS can be challenging because its symptoms can be similar to other shoulder problems. Your doctor will ask about your symptoms, activities, and any past injuries; perform a physical examination to check your shoulder's range of motion, strength, sensation, and tenderness; may order imaging tests like MRI or ultrasound to look at the quadrilateral space, assess muscle size, and check for any abnormalities or scarring. In some cases, nerve conduction studies (NCS) or electromyography (EMG) might be performed to evaluate how well the axillary nerve is working. An injection of local anesthetic into the quadrilateral space that temporarily relieves your symptoms can also help confirm the diagnosis.

When is surgery considered for QSS?

Surgery is usually considered if non-surgical treatments haven't significantly improved your symptoms after about six weeks or more; symptoms are severe or progressively worsening; or there's clear evidence of nerve damage or significant compression.

What does the surgical procedure involve?

The goal of surgery, called decompression, is to relieve pressure on the axillary nerve and posterior circumflex humeral artery. This typically involves making a small incision at the back of your shoulder; identifying the compressed nerve and artery; carefully removing or cutting any fibrous bands, scar tissue, or other abnormal structures that are causing the compression. The procedure is designed to free up the nerve and artery, allowing them to function normally.

What are the potential risks of surgery?

As with any surgery, there are potential risks, though QSS surgery is generally safe. These can include infection, bleeding, damage to surrounding nerves or blood vessels, scarring, persistent pain or incomplete relief of symptoms, and reaction to anesthesia. Your surgeon will discuss these risks with you in detail.

What do I need to do before surgery?

Your healthcare team will provide specific instructions, but generally, you may need to undergo a pre-operative physical examination and blood tests; stop certain medications (e.g., blood thinners, some anti-inflammatory drugs) a week or two before surgery; arrange for someone to drive you home after surgery and help you during the first few days of recovery; and avoid eating or drinking for a certain period before the surgery.

What can I expect immediately after surgery?

You will likely have your arm in a sling to help it rest and heal. You may experience some pain, which will be managed with medication. Your surgical site will be covered with a dressing. Your surgeon will give you instructions on wound care and activity restrictions.

When can I expect to return to daily activities, work, driving, and sports?

This timeline varies greatly based on your recovery progress and the demands of your activities. Daily activities: Light daily activities can usually be resumed within a few days to weeks. Driving: You can typically drive once you are no longer taking strong pain medications and have sufficient control and range of motion in your shoulder to safely operate a vehicle (often a few weeks after surgery). Work: Return to work depends on the nature of your job. Light, desk-based work might be possible within a few weeks, while jobs requiring heavy lifting or repetitive overhead movements will take longer, potentially several months. Sports: A gradual return to sports, especially overhead activities, will be guided by your physical therapist and surgeon, often not for several months after surgery. Full return to competitive sports may take 3-6 months or longer.

What is the expected long-term outcome?

For many patients, surgical decompression of QSS provides significant relief from pain, numbness, and weakness, allowing them to return to their normal activities, including sports. Nerve healing can be slow, so improvement may continue for several months. While some mild symptoms may occasionally linger, the goal is to significantly improve your quality of life and shoulder function.

Shoulder Conditions

Rotator Cuff Tear

Get Clear, Concise Answers to Your Top Questions About Rotator Cuff Tear

Navigating a shoulder condition can be overwhelming. On this page, we've compiled the 15 most frequently asked questions about Rotator Cuff Tear to give you straightforward, expert-backed answers. Understand your symptoms, diagnosis, and what comes next with insights from Dr. Christian Veillette's practice. Plus, explore trusted external resources for even more information.

Q1: What is a Rotator Cuff Tear?

The rotator cuff is a group of four muscles and their tendons that surround your shoulder joint. They help stabilize your arm and allow you to lift and rotate it. A rotator cuff tear occurs when one or more of these tendons pulls away from your arm bone.

Q2: What causes a Rotator Cuff Tear?

Tears can happen from:

Acute injury: A sudden event like a fall onto an outstretched arm or a direct blow to the shoulder.
Degenerative wear and tear: This is more common with age, due to repetitive overhead motions, decreased blood supply to the tendons, and natural aging processes.

Q3: What are the common symptoms of a Rotator Cuff Tear?

Common symptoms include:

Deep, aching shoulder pain, often radiating down the arm.
Pain that worsens with lifting, reaching overhead, or performing activities behind your back.
Weakness when lifting or rotating your arm.
Difficulty sleeping, especially when lying on the affected side.
Clicking, popping, or grinding sensations in the shoulder.
Limited range of motion in the shoulder.

Q4: How is a Rotator Cuff Tear diagnosed?

Your doctor will perform a physical exam, moving your arm in different positions and testing your strength. Imaging tests may also be used, such as:

X-rays: To check for bone spurs or other bone issues (tears don't show on X-rays).
Ultrasound: Uses sound waves to visualize soft tissues like tendons.
MRI (Magnetic Resonance Imaging): Provides detailed images of all shoulder structures, which is the "gold standard" for showing rotator cuff tears.

Q5: What are the non-surgical treatment options for a Rotator Cuff Tear?

Non-surgical options are often tried first and may include:

Rest and Activity Modification: Avoiding movements that cause pain and modifying daily activities.
Ice and Heat Therapy: Ice helps reduce swelling and pain, while heat can loosen tight muscles.
Anti-inflammatory Medications: Over-the-counter (like ibuprofen) or prescription medications to reduce pain and swelling.
Physical Therapy: Specific exercises to improve strength, flexibility, and range of motion.
Corticosteroid Injections: Steroid injections can reduce pain and inflammation but are not a long-term solution and may weaken tendons with repeated use.

Q6: What are the pros and cons of non-surgical treatment?

Pros:

Avoids surgical risks (infection, anesthesia, etc.).
Can be effective for many tears, especially smaller ones or those without significant weakness.
Allows you to avoid a longer recovery period.

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Cons:

May not fully relieve pain or restore strength for all tears.
The tear may not heal and could potentially worsen over time.
Requires consistent effort with physical therapy and activity modification.

Q7: What does Rotator Cuff Repair surgery involve (briefly)?

The goal of surgery is to reattach the torn tendon(s) to the bone. This can be done through:

Arthroscopic surgery: A minimally invasive procedure using a small camera and instruments inserted through small incisions.
Mini-open repair: A combination of both. Your surgeon will choose the best approach based on your tear.

Q8: What are the goals of Rotator Cuff Repair surgery?

The main goals are to:

Relieve pain.
Restore strength and range of motion in the shoulder.
Improve overall shoulder function.

Q9: What are the potential risks of Rotator Cuff Repair surgery?

As with any surgery, there are risks, including:

Infection.
Bleeding.
Nerve or blood vessel damage.
Anesthesia complications.
Stiffness in the shoulder (frozen shoulder).
Failure of the repair (re-tear).

Q10: What do I need to do before Rotator Cuff surgery?

Medication Review: You may need to stop certain medications (like blood thinners or anti-inflammatory drugs) before surgery.
Medical Clearances: If you have other health conditions (e.g., heart disease, diabetes), your doctor may ask you to see specialists to ensure you are healthy enough for surgery.
Physical Therapy: Sometimes, "pre-hab" (physical therapy before surgery) is recommended to improve strength and range of motion.
Home Preparation: Arrange for help at home (meals, chores), set up a comfortable recovery area, and make frequently used items easily accessible. Consider loose-fitting clothes that button or zip in the front.

Q11: What can I expect immediately after Rotator Cuff surgery?

You will likely experience some pain and discomfort, which will be managed with medication. Your arm will be placed in a sling to protect the repair, usually worn for several weeks. You will be given instructions on incision care, ice application, and initial gentle movements.

Q12: How long is the typical recovery period after Rotator Cuff surgery?

Full recovery can take anywhere from 4 to 12 months, depending on the size of the tear, your overall health, and how well you follow your rehabilitation plan.

First 4-6 weeks: Sling use and passive exercises (where someone else moves your arm).
Weeks 6-12: Gradual return to active motion and light strengthening.
Weeks 12-24+: Progressive strengthening and functional exercises.

Q13: What does rehabilitation/physical therapy involve after surgery?

Physical therapy is crucial for a successful recovery. It typically progresses through phases:

Phase 1 (Protection): Focus on protecting the repair, reducing pain and swelling, and gentle passive range of motion.
Phase 2 (Early Motion): Gradually increasing active motion and gentle strengthening exercises.
Phase 3 (Strengthening): More intensive strengthening exercises for the rotator cuff and surrounding muscles.
Phase 4 (Return to Activity): Sport-specific or work-specific exercises to prepare for full return to activities.

Q14: How will pain be managed during recovery?

Pain management typically involves:

Prescription pain relievers: For immediate post-surgical pain.
Over-the-counter medications: NSAIDs (like ibuprofen) and acetaminophen for milder pain and inflammation.
Ice therapy: Regularly applying ice packs to the shoulder.
Activity modification: Avoiding movements that worsen pain.
Physical therapy: Exercises designed to reduce pain and improve function.

Q15: What signs or symptoms should I watch out for and report to my doctor immediately?

Contact your doctor if you experience:

Severe or worsening pain that isn't relieved by medication.
Fever or chills.
Increased redness, swelling, or warmth around the incision site.
Pus or foul-smelling discharge from the incision.
Numbness or tingling in your arm or hand.
Significant unexpected weakness.
Any signs of a blood clot (e.g., severe calf pain, swelling, tenderness).

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We encourage you to write down any specific questions you have and discuss them thoroughly with your surgeon, doctor, or physical therapist. They are your best resource for personalized advice and care.

Disclaimer: This brochure provides general information and is not a substitute for professional medical advice. Always consult your doctor or qualified healthcare provider with any questions you may have regarding your specific medical condition and treatment plan.

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