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Absent sural responses in tethered cord syndrome
Elia G Malek1, Johnny Salameh1, Nour Estaitieh1
1Neurology department, American University of Beirut Medical Center, Beirut, Lebanon.
The Journal of Spinal Cord Medicine
|June 5, 2020
Summary
Tethered cord syndrome can present with an absent sural sensory response. This finding may indicate selective sensory fiber injury, aiding diagnosis in neurological cases.
Area of Science:
- Neurology
- Neurophysiology
Background:
- Tethered cord syndrome is a progressive neurological disorder diagnosed in early life.
- It causes diverse manifestations, including neurologic, urologic, and orthopedic dysfunction.
Purpose of the Study:
- To report two cases of tethered cord syndrome associated with a unilaterally absent sural sensory response.
- To explore the potential cause of this specific electrodiagnostic finding.
Main Methods:
- Nerve conduction studies were performed.
- Other potential causes for the absent sural sensory response were excluded.
Main Results:
- Two cases of tethered cord syndrome demonstrated a unilaterally absent sural sensory response.
- The absence of this response was not attributable to other common causes.
Conclusions:
- The unilaterally absent sural sensory response in tethered cord syndrome may be a specific diagnostic indicator.
- This finding is hypothesized to result from selective injury to sensory fibers at or distal to the dorsal root ganglia.
