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C5-C6 Disc-Osteophyte Complex with Ventral Cord Indentation: MRI Findings & Clinical Implications

Imaging Finding: "Broad-based posterior disc-osteophyte complex at C5-C6 with indentation on the ventral aspect of the cervical cord."

Anatomic Decoding

Pathophysiology

Degenerative disc dehydration → loss of height → annular buckling + osteophyte formation at uncovertebral (Luschka) and facet joints → progressive narrowing of spinal canal (central stenosis) and neural foramina (foraminal stenosis).

Clinical Correlation

Component	Meaning
C5-C6	Most mobile cervical segment; commonest site of spondylosis.
Broad-based	Wide-based (≥25% circumference), not focal herniation.
Posterior disc-osteophyte complex	Chronic degenerative: disc bulge + marginal osteophytes (spondylosis) — firm, broad.
Ventral cord indentation	Anterior spinal cord compression (dorsal to cord). "Indentation" = deformity without signal change (T2 hyperintensity = myelomalacia).

Syndrome	Features	Relevance Here
C6 Radiculopathy	Pain: neck → shoulder, lateral arm, thumb/index. Weakness: biceps, wrist extensors. Reflex: biceps ↓.	Right/left foraminal encroachment → corresponding radiculopathy.
Cervical Spondylotic Myelopathy (CSM)	Gait ataxia, hand clumsiness, hyperreflexia, Babinski, Hoffman's, sensory level.	Ventral indentation → risk if canal AP diameter <10 mm or T2 signal change.
Axial Neck Pain	Mechanical, non-radicular.	Discogenic; may coexist.

Management

Conservative: NSAIDs, PT (cervical stabilization, nerve glides, posture), cervical collar (short-term), epidural steroid injection (TFESI).
Monitoring: Serial neuro exams; MRI if myelopathic signs emerge.
Surgical Indications: Progressive myelopathy, intractable radiculopathy >6–12 weeks, significant cord compression + signal change.
Procedures: ACDF (anterior cervical discectomy/fusion), posterior laminoplasty/foraminotomy, artificial disc replacement (selective).

Key Point

"Indentation" without T2 hyperintensity suggests compressive but not yet myelopathic. Clinical exam for UMN signs is critical. Many asymptomatic adults have similar findings — treat the patient, not the image.