Key Clinical Tests for Early DCM Detection
The review identified several clinical examinations that may detect Degenerative Cervical Myelopathy (DCM) earlier than traditional neurological signs alone.
https://journals.sagepub.com/doi/10.1177/21925682261437765
1. Trömner Sign
How it’s performed:
- The examiner flicks the palmar surface of the middle finger.
- A positive test causes involuntary flexion of the thumb and index finger.
Why it matters:
- Demonstrated 94% sensitivity and a high negative predictive value.
- Was often positive even in patients without MRI cord signal changes, suggesting usefulness in very early disease.
Clinical value:
- One of the strongest bedside tests for ruling out DCM and identifying presymptomatic cases.
2. Dynamic Hoffmann’s Sign
How it’s performed:
- Hoffmann testing is repeated while the patient actively flexes and extends the neck.
Why it matters:
- Correlated with cervical canal narrowing.
- May reveal early cord dysfunction before more obvious myelopathic signs appear.
Clinical value:
- Useful screening test during routine neurological examination.
3. Wazir Hand Myelopathy Sign
How it’s performed:
- The wrist is tapped near the palmaris longus tendon.
- Patients with myelopathy show exaggerated finger, thumb, and wrist flexion.
Why it matters:
- Positive in 93% of patients with cervical stenosis above C5-C6.
Clinical value:
- Helps detect early “myelopathy hand” dysfunction.
4. Grip-and-Release Test (10- or 15-Second Test)
How it’s performed:
- The patient rapidly opens and closes the hand for a set period.
Why it matters:
- Detects impaired finger coordination and dexterity.
- Abnormal results correlate with myelopathy severity and balance impairment.
Clinical value:
- Quick, quantitative measure of early hand dysfunction.
5. Ten-Second Step Test
How it’s performed:
- The patient marches in place, lifting knees to hip height for 10 seconds.
- Total steps are counted.
Why it matters:
- Strongly correlates with gait impairment, hand function, and mJOA scores.
Clinical value:
- Excellent simple assessment of early lower-limb involvement.
6. Rossolimo Reflex
How it’s performed:
- Tapping the plantar surface of the toes produces abnormal flexion responses.
Why it matters:
- Present in all DCM patients studied and absent in controls.
- Reflex amplitude correlated with spinal cord compression severity.
Clinical value:
- Helpful marker of upper motor neuron dysfunction.
7. Gait Assessment
What clinicians look for:
- Unsteadiness
- Reduced walking speed
- Balance problems
- Abnormal gait pattern
Why it matters:
- Gait abnormalities, especially when combined with other signs, improved diagnostic accuracy.
Clinical value:
- Should raise suspicion for DCM, particularly in adults over 50.
8. Combined Clinical Findings
The review highlighted that the following combination was particularly useful for identifying cervical myelopathy:
- Positive Hoffmann sign
- Positive Babinski sign
- Inverted supinator sign
- Gait abnormality
- Age >45 years
Using multiple findings together improves diagnostic confidence compared with relying on a single sign.
Most Promising Bedside Tests
If clinicians are looking for the highest-yield early screening tools, the review particularly emphasizes:
- Trömner sign
- Dynamic Hoffmann’s sign
- Grip-and-release test
- Ten-second step test
- Rossolimo reflex
These tests are inexpensive, non-invasive, quick to perform, and may identify DCM before conventional signs or MRI abnormalities become obvious.