A patient with a four‑day history of shoulder and neck pain, described as dull throbbing over the trapezius area when turning the neck, full range of motion, no specific mechanism of injury, and a past medical history of dorsalgia, asks: what are the possible differential diagnoses and appropriate treatment plan?

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Differential Diagnosis and Treatment Plan

This is most likely acute mechanical neck pain (cervical myofascial pain/trapezius strain) that requires conservative management without imaging, given the absence of red flags, full range of motion, and short symptom duration.

Differential Diagnoses

Based on the clinical presentation, the primary differentials include:

Most Likely:

  • Cervical myofascial pain syndrome/trapezius strain – The dull, throbbing pain localized to the trapezius area with full ROM and no trauma mechanism strongly suggests muscular origin
  • Cervical facet joint pain – Can present with referred pain to the trapezius region, though typically more focal
  • Cervical spondylosis – Given the history of dorsalgia, though less likely with full ROM and acute presentation

Important to Rule Out:

  • Shoulder impingement with referred neck pain – Shoulder pathology can masquerade as neck pain, particularly when pain localizes to the superomedial scapular region 1. This is a critical pitfall, as patients may present with neck pain rather than typical shoulder symptoms 2
  • Cervical radiculopathy – Less likely given full ROM and absence of radicular symptoms, but should be monitored

Clinical Evaluation Priorities

Key examination maneuvers to perform:

  • Shoulder impingement testing (Neer's sign, Hawkins-Kennedy test) – Positive findings with neck pain reproduction suggest shoulder origin 1, 3
  • Cervical range of motion with overpressure – Assess for radicular symptoms
  • Palpation of cervical facets and paraspinal muscles – Identify specific tender points
  • Spurling's test – Rule out radiculopathy
  • Assess for red flags – Fever, weight loss, immunosuppression, elevated inflammatory markers, neurological deficits 4

Critical distinction: Shoulder disorders are frequently unrecognized in patients presenting with neck pain, particularly when cervical pathology is at C4-5 or C5-6 levels 3. The combination of neck and shoulder symptoms warrants specific shoulder examination.

Imaging Recommendations

No imaging is indicated at this time 4. The 2025 ACR guidelines are clear that acute cervical pain (<6 weeks) without radiculopathy, trauma, or red flags does not require initial imaging 4. The prevalence of neck pain ranges 15-50% annually, and mechanical pain from spine/supporting structures represents the majority of cases 4.

Imaging would be appropriate if:

  • Symptoms persist beyond 6 weeks
  • Red flags develop (fever, weight loss, neurological deficits, elevated inflammatory markers)
  • Progressive neurological symptoms emerge
  • Failure of conservative management

Treatment Algorithm

Immediate Management (Days 1-7):

  1. NSAIDs – Aceclofenac or similar NSAID for acute nonspecific pain control 5
  2. Muscle relaxant – Tolperisone (central-acting, prolonged) for musculotonic component 5
  3. Activity modification – Avoid positions that exacerbate pain, but maintain gentle movement
  4. Heat application – Local heat to trapezius region 6

Week 2-4 (if symptoms persist):

  1. Manual therapy – Muscle energy techniques, specifically reciprocal inhibition technique for trapezius 6
  2. Physical therapy – Progressive range of motion and strengthening
  3. Consider diagnostic injection – If shoulder impingement suspected, subacromial lidocaine/corticosteroid injection can be both diagnostic and therapeutic 1. Relief of neck pain after subacromial injection confirms shoulder origin

Week 4-6 (if no improvement):

  1. Reassess for neuropathic component – If neuropathic features develop, consider pregabalin 5
  2. Advanced physical therapy modalities – Shockwave therapy (most effective), high-intensity laser therapy, or combination 7
  3. Reconsider imaging – MRI cervical spine if symptoms persist or worsen

Critical Pitfalls to Avoid

The most common diagnostic error is missing shoulder pathology presenting as neck pain 1, 2, 3. Studies show 15.8% of patients diagnosed with cervical spondylosis actually had unrecognized shoulder disorders requiring orthopedic treatment 3. Always perform shoulder impingement testing when pain localizes to the superomedial scapular/trapezius region.

Do not order imaging prematurely – This drives up healthcare costs (neck and low back pain expenditure approached $134.5 billion in 2016) without improving outcomes in acute presentations without red flags 4.

Monitor for red flags continuously – While initial presentation is benign, development of constitutional symptoms, neurological deficits, or elevated inflammatory markers changes management entirely 4.

Expected Course

With appropriate conservative management, most acute mechanical neck pain resolves within 4-6 weeks. However, nearly 50% of individuals experience recurrent or persistent symptoms 4, making patient education about ergonomics and activity modification essential for long-term outcomes.

References

1
Research

Shoulder impingement presenting as neck pain.

The Journal of bone and joint surgery. American volume, 2003

4
Guideline

acr appropriateness criteria® cervical pain or cervical radiculopathy: 2024 update.

Journal of the American College of Radiology, 2025

5
Research

[Control of neuropathic pain in lumbosacral dorsalgia].

Zhurnal nevrologii i psikhiatrii imeni S.S. Korsakova, 2024

7
Research

[Comparative analysis of the effectiveness of modern physiotherapeutical methods of dorsalgia treatment].

Voprosy kurortologii, fizioterapii, i lechebnoi fizicheskoi kultury, 2025

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