Cervical Myelopathy with Anterior Cord Compression and Foraminal Stenosis: Expected Symptoms
A patient with cervical myelopathy from C3-C4 to C5-C6 anterior cord compression combined with severe right foraminal stenosis at C4-C5 and C5-C6 will experience both myelopathic symptoms (decreased hand dexterity, gait instability, upper and lower extremity motor/sensory dysfunction) and radicular symptoms (right arm pain, numbness, and weakness in specific nerve root distributions).
Myelopathic Symptoms (From Cord Compression)
The anterior cord compression from C3-C4 to C5-C6 produces classic cervical spondylotic myelopathy symptoms 1:
Upper Extremity Manifestations
- Decreased hand dexterity - difficulty with fine motor tasks like buttoning shirts, writing, or handling small objects
- Hand weakness and clumsiness
- Intrinsic hand muscle atrophy (particularly in advanced cases) 2
- Sensory disturbances in hands and arms
- Loss of proprioception
Lower Extremity Manifestations
- Gait instability and difficulty walking - the hallmark lower extremity symptom 1
- Leg stiffness and spasticity
- Balance problems
- Lower extremity weakness
Additional Myelopathic Features
- Hyperreflexia in upper and lower extremities
- Positive Hoffman's sign
- Positive Babinski sign (upgoing toes)
- Bladder dysfunction in severe cases 3
- Neck pain (though not always present)
The natural history shows that 27% of patients present with myelopathy symptoms, and these can progress unpredictably without treatment 4.
Radicular Symptoms (From Right Foraminal Stenosis)
The severe right foraminal stenosis at C4-C5 and C5-C6 will produce right-sided radicular symptoms in specific nerve root distributions 5, 6:
C5 Nerve Root (C4-C5 Foraminal Stenosis)
- Pain radiating to right shoulder and lateral upper arm
- Weakness in shoulder abduction (deltoid)
- Numbness over lateral shoulder/upper arm
- Diminished biceps reflex
C6 Nerve Root (C5-C6 Foraminal Stenosis)
- Pain radiating down right arm to thumb and index finger
- Weakness in elbow flexion (biceps) and wrist extension
- Numbness in thumb and radial forearm
- Diminished brachioradialis reflex
The combination of both levels means the patient likely experiences overlapping pain patterns affecting the entire right upper extremity 7.
Clinical Presentation Pattern
This patient presents with a mixed clinical picture that requires recognition of both pathologies 8, 7:
- Bilateral myelopathic symptoms affecting both upper extremities (hand clumsiness) and lower extremities (gait problems)
- Superimposed unilateral right arm radicular pain and weakness from foraminal stenosis
- The radicular symptoms may be more prominent and bothersome to the patient than the myelopathic symptoms initially
Important Clinical Considerations
The presence of myelopathy indicates spinal cord injury and requires urgent evaluation 1. MRI is the imaging modality of choice to confirm cord compression and assess for T2 signal changes within the cord, which indicate myelomalacia and correlate with worse prognosis 9.
Physical examination findings that support this diagnosis include:
- Upper motor neuron signs (hyperreflexia, Babinski, Hoffman's)
- Dermatomal sensory loss on the right corresponding to C5/C6
- Myotomal weakness on the right in C5/C6 distributions
- Gait abnormalities with wide-based or spastic pattern
Critical pitfall: The radicular arm pain may overshadow subtle myelopathic symptoms, leading to delayed recognition of cord compression. Always assess for hand dexterity and gait abnormalities even when radicular symptoms dominate the presentation 1.
The severity can range from mild (modified Japanese Orthopaedic Association score >12) to severe (mJOA ≤12), with moderate-to-severe disease requiring surgical intervention 10. Patients with combined pathology like this typically require surgical decompression addressing both the anterior cord compression and the foraminal stenosis, which may necessitate combined anterior-posterior approaches or tailored single-approach strategies 8, 7, 11.