A 62-year-old man presents with a 3-month history of progressive gait disturbance, loss of hand dexterity, and finger escape sign. MRI cervical spine shows multilevel disc-osteophyte complexes with severe canal stenosis and cord compression. The structure marked **C** in the diagram demonstrates intramedullary T2 hyperintensity consistent with myelomalacia. Which of the following best describes the pathophysiological significance of this finding?
A. It is a transient signal change caused by venous congestion and will improve with NSAIDs and physical therapy alone
B. It represents acute inflammatory edema of the cord that will resolve completely with conservative management and cervical collar immobilization
C. It indicates chronic ischemia, demyelination, and gliosis of the spinal cord, representing irreversible cord damage and a poor prognostic marker for functional recovery
D. It reflects reversible cord swelling from mechanical compression and indicates excellent prognosis regardless of surgical timing
Explanation
Why option 1 is correct
The T2 hyperintensity (myelomalacia) seen on MRI in cervical spondylotic myelopathy represents chronic ischemia, demyelination, and ultimately gliosis of the spinal cord — the pathological consequence of prolonged mechanical compression. This finding is a critical prognostic marker indicating irreversible cord damage. According to Harrison's 21e and AOSpine guidelines, the presence of intramedullary T2 signal change is associated with poorer functional recovery, even after surgical decompression. This underscores the importance of early surgical intervention (within 2 years of symptom onset) before irreversible cord changes develop.
Why each distractor is wrong
Option 2: Myelomalacia is NOT acute inflammatory edema. It represents chronic degenerative changes (gliosis and demyelination), not reversible inflammation. Conservative management alone cannot reverse established cord tissue damage.
Option 3: T2 hyperintensity is not merely transient venous congestion. It reflects structural cord pathology (ischemia and demyelination), not a temporary metabolic disturbance. NSAIDs and PT cannot reverse gliotic changes.
Option 4: Myelomalacia indicates irreversible cord damage, not reversible swelling. The presence of this finding is associated with worse outcomes and emphasizes the need for timely surgical decompression — delayed surgery in the presence of myelomalacia carries a poorer prognosis.
High-YieldNEET PG
T2 hyperintensity (myelomalacia) in CSM = chronic ischemia + demyelination + gliosis = poor prognostic marker → early surgery (within 2 years) is critical.
Harrison's 21e Ch 442; AOSpine North America Guidelines 2017
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