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.

What are the non-surgical treatment options?

Most cases of QSS improve with non-surgical treatment. These options focus on reducing pressure on the nerve and artery, managing pain, and restoring function: rest and activity modification (avoiding or modifying activities that worsen your symptoms, especially overhead movements); anti-inflammatory medications (over-the-counter or prescription NSAIDs like ibuprofen can help reduce pain and inflammation); ice or heat packs (applying ice can help reduce pain and inflammation, especially after activity, heat can help relax muscles); physical therapy (a physical therapist will guide you through exercises to maintain or improve shoulder range of motion and flexibility, strengthen the muscles around your shoulder to provide better support, improve posture and body mechanics); and corticosteroid injections (in some cases, your doctor may suggest an injection of corticosteroid medication into the area to reduce inflammation and pain).

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 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 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

Proximal Bicep Tendon Rupture

Get Clear, Concise Answers to Your Top Questions About Proximal Bicep Tendon Rupture

Navigating a shoulder condition can be overwhelming. On this page, we've compiled the 15 most frequently asked questions about Proximal Bicep Tendon Rupture 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 proximal bicep tendon rupture?

A proximal bicep tendon rupture is a tear in one of the two tendons that connect your bicep muscle to your shoulder. The bicep muscle has two "heads" at the shoulder, hence "proximal." Most often, it's the "long head" tendon that tears. This tear can be partial (some fibers are still connected) or complete (the tendon fully detaches from the bone).

Q2: What causes a proximal bicep tendon rupture?

These tears are most often due to years of wear and tear on the shoulder, especially in middle-aged or older individuals. They can also occur from sudden forces like lifting heavy objects, a fall on an outstretched arm, or repetitive overhead activities. Smoking and certain medications can also increase your risk.

Q3: What are the common symptoms?

You might experience:

A sudden, sharp pain in your shoulder or upper arm.
A "pop" or "snap" at the time of injury.
Bruising in the upper arm, which may spread down to the elbow.
A bulge in your upper arm (sometimes called a "Popeye muscle" deformity) where the bicep muscle bunches up closer to the elbow.
Weakness when bending your elbow or twisting your forearm (like turning a screwdriver).
Difficulty lifting your arm overhead.
Muscle cramping in the bicep.

Q4: How is a proximal bicep tendon rupture diagnosed?

Your doctor will review your symptoms, medical history, and perform a physical exam to assess your arm strength and movement. They will look for characteristic signs like the "Popeye muscle." Imaging tests, such as an MRI, are often used to confirm the diagnosis, determine the extent of the tear (partial or complete), and check for other shoulder injuries like rotator cuff tears. X-rays can show bone issues but not the tendon itself.

Q5: What are the treatment options?

Treatment options depend on several factors, including your age, activity level, and whether other shoulder structures are injured.

Non-surgical treatment: For many people, especially those with less active lifestyles or partial tears, pain and function can improve without surgery.
Surgical treatment: This is often recommended for active individuals, complete tears, or when non-surgical methods don't provide enough relief, especially if there are other shoulder injuries.

Q6: What does non-surgical treatment involve?

Non-surgical treatment often includes:

Rest: Avoiding activities that aggravate your symptoms, such as heavy lifting and overhead movements. Your doctor may recommend a sling for a short period.
Ice: Applying cold packs to reduce swelling and pain.
Medication: Over-the-counter anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen can help reduce pain and swelling.
Physical Therapy: Exercises to restore movement and strengthen your shoulder and arm muscles.

Q7: What does the surgical procedure (bicep tenodesis) involve?

The most common surgical procedure for a proximal bicep tendon rupture is called a bicep tenodesis. During this procedure, the torn portion of the bicep tendon is reattached to a different area on your upper arm bone (humerus) instead of its original attachment point in the shoulder joint. This is done to relieve pain, restore strength, and prevent the "Popeye muscle" deformity. The surgery may be done through a small incision (arthroscopically) or an open incision.

Q8: What are the goals of surgery?

The main goals of surgery are to:

Reduce pain.
Restore strength and function to your arm.
Improve the cosmetic appearance of your bicep (by addressing the "Popeye muscle").

Q9: What are the potential risks of surgery?

Like any surgery, bicep tendon repair carries some risks, including:

Infection
Bleeding
Nerve damage (leading to numbness, tingling, or weakness)
Blood clots
Stiffness in the shoulder or elbow
Failure of the tendon to heal
Reactions to anesthesia

Your surgeon will discuss these risks with you in detail.

Q10: How do I prepare for surgery?

Medical Evaluation: You will undergo a thorough medical evaluation to ensure you are healthy enough for surgery.
Medications: Your doctor may ask you to stop certain medications, especially blood thinners, before surgery. Provide a complete list of all medications, supplements, and natural health products you take.
Fasting: You will need to avoid eating and drinking for a certain period before surgery, as instructed by your medical team.
Arrangements: Arrange for someone to drive you home after surgery and to help with daily tasks during your initial recovery.
Hygiene: You might be asked to shower with a special antibacterial soap the night before and the morning of your surgery.
Questions: Make sure all your questions are answered before the day of surgery.

Q11: What can I expect immediately after surgery?

You will likely have pain, which will be managed with medication.
Your arm will be placed in a sling to protect the repair and limit movement, typically for several weeks.
You will receive instructions on wound care, pain management, and activity restrictions.
Icing your shoulder regularly will help reduce swelling and discomfort.

Q12: How long is the typical recovery period?

Full recovery after bicep tendon repair can take 4 to 6 months, and sometimes up to a year for complete strength return.

Initial weeks (0-6 weeks): Focus on protecting the repair, wearing a sling, and light exercises to prevent stiffness (often passive range of motion exercises guided by a therapist).
Intermediate phase (6-12 weeks): Gradual increase in active range of motion and light strengthening exercises.
Advanced phase (12-20+ weeks): Progressive strengthening and functional exercises, with a gradual return to more demanding activities.

Individual recovery times vary greatly.

Q13: What does rehabilitation/physical therapy involve?

Physical therapy is a crucial part of your recovery. It will progress in phases, starting with gentle exercises to regain motion without stressing the healing tendon. As you heal, your therapist will guide you through strengthening exercises for your shoulder and arm. The goal is to gradually improve your range of motion, strength, and function, helping you safely return to your desired activities.

Q14: How will pain be managed?

Your doctor will prescribe pain medication to help manage discomfort after surgery. You may also use over-the-counter pain relievers (like acetaminophen) or NSAIDs if approved by your doctor. Ice packs are also very effective for pain and swelling. Follow your medication instructions carefully.

Q15: What can I do at home to help my recovery?

Follow instructions: Adhere strictly to your surgeon's and physical therapist's instructions regarding activity restrictions, sling use, and exercises.
Manage pain: Use pain medication as prescribed and apply ice regularly to reduce swelling and pain.
Protect your arm: Avoid lifting, pushing, pulling, or sudden movements with your injured arm.
Nutrition: Eat a healthy diet to support healing.
Avoid smoking: Smoking can impair healing.
Rest: Get plenty of rest to allow your body to heal.

Q16: When can I expect to return to daily activities, work, driving, and sports?

Timelines vary for each individual:

Desk work: May return in 1-2 weeks, keeping the arm supported.
Driving: Typically not allowed while wearing a sling or taking strong pain medication, usually 4-6 weeks.
Light daily activities: Gradually introduced over weeks, avoiding heavy lifting.
Heavy lifting/strenuous work: May take 3-6 months or longer.
Sports/overhead activities: A gradual return, usually after 4-6 months, and only with your surgeon's and physical therapist's approval, as your strength and range of motion allow.

Q17: What signs or symptoms should I watch out for and report to my doctor immediately?

Contact your doctor if you experience:

Fever or chills
Increased redness, swelling, or warmth around the incision
Pus or foul-smelling drainage from the incision
Severe or worsening pain not controlled by medication
Numbness or tingling in your hand or fingers
Sudden, significant weakness in your arm
Calf pain, swelling, or redness (could indicate a blood clot)
Shortness of breath or chest pain (seek emergency care)

Q18: What is the expected long-term outlook?

Most people who undergo treatment for a proximal bicep tendon rupture experience significant improvement in pain and function. While some loss of strength or a minor cosmetic change (the "Popeye muscle") may persist, especially without surgery, many individuals can return to their daily activities and even sports. The long-term outlook is generally good with proper rehabilitation.

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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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