Causes of Neck Pain Radiating to Upper Back/Trapezius

Primary Mechanical Causes

The American College of Radiology recommends that nerve root compression from herniated discs or osteophytes is considered the primary neuropathic cause of neck pain radiating to the upper back, typically presenting with upper limb pain and varying degrees of sensory or motor deficits in the affected nerve root distribution 1, 2
Compression occurs from soft disc herniation, hard disc (spondylarthrosis of facet or uncovertebral joints), or a combination of both, with an annual incidence of approximately 83 per 100,000 persons, making it a common cause of chronic neck pain 1
The American College of Radiology states that 75-90% of cervical radiculopathy cases resolve with conservative nonoperative therapy 1
Facet joint arthropathy causes localized mechanical pain that may be unilateral and radiate to the trapezius region, with cervical spondylosis and degenerative disc disease being extremely common, affecting 53.9% of individuals aged 18-97, with prevalence increasing with age 1, 3

The American College of Radiology and Praxis Medical Insights recommend immediate investigation for vertebral osteomyelitis or discitis, metastatic disease to cervical vertebrae, inflammatory arthritis, cervical myelopathy, and primary spinal tumors, as these conditions are potentially life-threatening 3, 4
A critical red flags checklist should be used to screen every patient for indicators requiring immediate imaging, including constitutional symptoms, elevated inflammatory markers, history of malignancy or immunosuppression, history of IV drug use, neurological deficits, intractable pain, and vertebral body tenderness on palpation 3, 2, 4

The American College of Radiology recommends that imaging should not be ordered in the absence of red flags, as most acute cervical neck pain resolves spontaneously or with conservative treatment, with approximately 50% of patients having residual or recurrent pain up to 1 year after initial presentation 1, 2, 5
If red flags are present, an MRI cervical spine without contrast should be obtained immediately, and if no red flags but persistent symptoms beyond 6-8 weeks of conservative therapy, an MRI cervical spine without contrast should be considered 3, 4
MRI is the most sensitive imaging modality for detecting soft tissue abnormalities, disc herniation, nerve root impingement, inflammatory processes, infection, and tumor, with a positive Spurling's test being highly specific for nerve root compression from herniated cervical disc 1, 3, 5

The American College of Radiology states that most cases (75-90%) of cervical radiculopathy resolve with conservative nonoperative therapy 1

The American College of Radiology recommends excluding serious pathology such as trauma, malignancy, or prior neck surgery before proceeding with facet-directed treatment, with a checklist that includes spinal cord injury symptoms, systemic diseases, and suspected infection 6
Controlled comparative local anesthetic blocks provide Level I or II-1 evidence for diagnosing cervical facet joint pain, although the text does not specify the society, the American College of Radiology is likely to recommend this 7
Imaging has no additive diagnostic value for cervical facet pain itself, though it may be useful for procedure planning, and degenerative changes on MRI are present in 53.9% of asymptomatic individuals and correlate poorly with pain 8

Radiofrequency ablation of the medial branches is a recommended interventional treatment, providing long-term analgesia exceeding 6 months, with Level II-1 or II-2 evidence 7
Therapeutic medial branch blocks provide short-term relief, with Level II-1 evidence 7

Most cervical radiculopathy cases (75-90%) resolve with nonoperative conservative therapy, according to the American College of Radiology 8
Approximately 50% of patients will have residual or recurrent neck pain up to 1 year after initial presentation, as reported by the American College of Radiology 7, 9