Should I examine the elbow and shoulder in a 16-year-old patient with hand pain after punching a cement wall?

Should You Examine the Elbow and Shoulder?

Yes, you should perform a focused examination of the elbow and shoulder in this 16-year-old with hand pain after punching a cement wall, as the mechanism of injury involves force transmission through the entire upper extremity kinetic chain that can cause occult proximal injuries.

Rationale for Proximal Examination

Force Transmission Patterns

• Punching mechanisms transmit significant axial and rotational forces proximally through the wrist, forearm, elbow, and shoulder 1, 2
• The elbow is particularly vulnerable to hyperextension injuries during wall-punching mechanisms, which can cause ligamentous injuries, occult fractures, or joint instability that may not be immediately apparent 2
• Shoulder injuries including rotator cuff tears, labral injuries, and glenohumeral instability can occur from the deceleration forces when the fist impacts a rigid surface 3

What to Look for on Examination

Elbow Assessment:

• Palpate for tenderness over the medial and lateral epicondyles, olecranon, and radial head 4, 1
• Check for joint effusion (visible swelling suggesting occult fracture) 4
• Assess range of motion and stability, particularly for hyperextension laxity 2
• Evaluate for mechanical symptoms (locking, catching) that indicate intra-articular pathology 5, 6

Shoulder Assessment:

• Palpate the acromioclavicular joint and anterior/posterior glenohumeral joint 3
• Assess active and passive range of motion in all planes 3
• Perform rotator cuff strength testing (supraspinatus, infraspinatus, subscapularis) 3
• Check for signs of instability with apprehension and relocation tests 3

Initial Imaging Strategy

• Start with hand radiographs (AP, lateral, and oblique views) as the primary concern, since this is where the patient localizes pain 7
• Add elbow radiographs if any tenderness, swelling, or restricted motion is found on examination 4, 1
• Add shoulder radiographs (AP internal/external rotation and axillary or scapular-Y views) if shoulder examination reveals abnormalities 3

Common Pitfalls to Avoid

• Anchoring bias: Don't assume the injury is limited to where the patient reports pain—adolescents may not recognize or report proximal symptoms 7, 8
• Missing "fight bite": If there's any laceration over the metacarpophalangeal joints, suspect human tooth inoculation (from punching someone's mouth rather than a wall) requiring aggressive irrigation and antibiotics 8
• Overlooking growth plate injuries: In a 16-year-old, physeal injuries at the elbow or shoulder may be present with minimal radiographic findings; MRI may be needed if clinical suspicion is high despite normal radiographs 3
• Delayed diagnosis of instability: Elbow or shoulder instability may not be apparent on static examination—if symptoms persist, stress fluoroscopy or dynamic ultrasound may be needed 1, 2

When to Escalate Imaging

• If elbow or shoulder examination is abnormal but radiographs are negative, consider MRI without contrast to evaluate for soft tissue injuries, occult fractures, or bone contusions 3, 4
• MRI is particularly useful for detecting physeal injuries in adolescents that may be missed on plain films 3