A greater tuberosity fracture affects the bony prominence of the humerus near the shoulder. It often results from trauma or falls, disrupts shoulder movement, and requires prompt diagnosis with X-ray or MRI. Treatment ranges from rest to surgery, depending on severity. Early rehab helps restore function and prevents stiffness.
What is a Greater Tuberosity Fracture?
A greater tuberosity fracture refers to a break in the greater tuberosity, a prominent area at the top of the humerus where several rotator cuff tendons attach. This injury commonly disrupts normal shoulder function, especially the ability to lift or rotate the arm.
Such fractures are a subset of proximal humerus fractures and require careful assessment, as tendon attachment can complicate healing. Understanding the prognosis and management options is key for optimizing patient outcomes and minimizing disability after shoulder trauma.
Shoulder Anatomy: Focus on the Greater Tuberosity
The greater tuberosity is a bony prominence on the humerus, just outside the shoulder joint. It serves as the attachment site for three important rotator cuff tendons: supraspinatus, infraspinatus, and teres minor. These muscles help stabilize and move the shoulder.
Damage to the greater tuberosity can compromise the integrity of the rotator cuff mechanism, affecting both shoulder stability and overall range of motion. Anatomically, it is vulnerable to direct blows or traction injuries from forceful muscle contractions during trauma.
| Location | Greater tuberosity, proximal humerus (shoulder region) |
|---|---|
| Common Causes | Falls, direct trauma, sports injuries, shoulder dislocation |
| Primary Symptoms | Pain, swelling, reduced arm movement, bruising |
| First-Line Imaging | X-ray (shoulder), follow-up with CT or MRI if needed |
| Treatment | Conservative (immobilization) or surgical (fixation) |
| Recovery Time | 6–12 weeks (varies by type and management) |
Causes and Risk Factors
The most common cause of a greater tuberosity fracture is a fall directly onto the shoulder, especially when the arm is outstretched. This mechanism often generates enough force to break the bony attachment of the rotator cuff tendons.
Additional causes include high-impact trauma (such as car accidents), sports-related collisions, and shoulder dislocations. Older adults with osteoporosis are at a higher risk, as weakened bone structure increases susceptibility to fracture even after minor injuries.
Common Causes of Greater Tuberosity Fracture
- Fall onto the side of the shoulder
- Direct trauma (e.g., car crashes, contact sports)
- Violent contraction of rotator cuff muscles
- Shoulder dislocation (anterior more common)
- Weak bones (osteoporosis)
Clinical Presentation and Symptoms
Patients with a greater tuberosity fracture usually report sudden, severe shoulder pain after trauma. They may have visible swelling, bruising, and tenderness over the lateral aspect of the shoulder. Movement, especially abduction and rotation, is often limited due to pain and possible mechanical block.
It’s important to distinguish these fractures from isolated rotator cuff injuries, which can present similarly but require different management. Suspicion should be higher in older adults or anyone after a significant shoulder impact or dislocation.
Diagnosis and Imaging
Initial assessment relies heavily on clinical evaluation, focusing on history of recent trauma, examination for tenderness, and loss of shoulder range of motion. However, definitive diagnosis requires imaging.
X-rays of the shoulder (anteroposterior, scapular Y, and axillary views) usually identify the fracture. If displacement is unclear or soft tissue injury is suspected, advanced imaging such as CT or MRI helps to assess the extent of bony and tendon involvement, guiding treatment decisions.
When Advanced Imaging is Useful
- Fracture poorly visualized on X-ray
- Assessing rotator cuff injury or tendon entrapment
- Pre-surgical planning
- Persistent symptoms without clear diagnosis
Treatment Options
Management of a greater tuberosity fracture depends mainly on the degree of displacement and patient factors (age, activity level, comorbidities). Minor, non-displaced or minimally displaced fractures are usually managed conservatively with immobilization (sling or shoulder immobilizer) and early physiotherapy.
Fractures displaced more than 5 mm, associated with rotator cuff entrapment, or those in highly active individuals often require surgical intervention. Procedures may include open reduction and internal fixation (ORIF) or arthroscopic techniques. Surgery aims to realign bone fragments and restore tendon function.
Indications for Surgery
- Displacement > 5 mm
- Failure of conservative management
- Entrapment of rotator cuff tendons
- Significant functional impairment
Rehabilitation and Recovery
Rehabilitation is a critical component of recovery, beginning as soon as pain allows. Early mobilization (under guidance) prevents shoulder stiffness and strengthens the surrounding muscles. Initial physiotherapy focuses on passive range-of-motion exercises, progressing to active movements and resistance training as healing permits.
Recovery time varies but typically ranges from 6 to 12 weeks, depending on fracture severity, treatment, and adherence to rehab protocols. Inadequate rehab can lead to long-term stiffness and reduced function, making patient education and follow-up extremely important.
Prognosis and Long-Term Outlook
Most patients with a greater tuberosity fracture regain good shoulder function with appropriate treatment and rehabilitation. However, complications can occur, such as persistent pain, impairment of shoulder rotation, malunion (poor bone healing), or rotator cuff weakness.
Early detection of complications and dedicated physiotherapy improve prognosis. Surgical patients generally return to higher levels of activity but may face a longer recovery timeline. Shared decision-making and regular clinical follow-up are essential for optimal outcomes.
Key Points for Exams and Clinical Practice
- Greater tuberosity fracture affects rotator cuff attachment and shoulder function.
- Suspect after shoulder trauma, especially with dislocation or elderly falls.
- X-ray is diagnostic but MRI/CT may be needed for soft tissue assessment.
- Non-displaced = conservative management, displaced >5 mm = consider surgery.
- Early physiotherapy is vital to prevent long-term stiffness.
- Always educate patients: immobilize early, move safely, and follow up closely.
Greater Tuberosity Fracture FAQ
What is the main role of the greater tuberosity?
The greater tuberosity is the attachment point for three key rotator cuff muscles that maintain shoulder stability and allow arm rotation and elevation.
How can you tell if a shoulder injury is a greater tuberosity fracture?
Look for localized pain, swelling, and limitation in shoulder motion—especially after trauma. X-rays confirm the diagnosis.
Do all greater tuberosity fractures need surgery?
No, most minimally displaced fractures heal well with conservative care. Surgery is reserved for fractures with significant displacement or functional impairment.
What are common pitfalls in management?
Missing associated rotator cuff injuries, underestimating displacement, or delaying rehabilitation can worsen long-term outcomes. Always reassess if recovery stalls.
Is full recovery expected?
The majority return to near-normal function, especially with timely diagnosis and structured rehab, though minor stiffness and weakness may persist in some cases.