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Dorsal arachnoid web: A rare cause of syringomyelia and myelopathy

Prasad Krishnan1, Sayan Das2

  • 1Department of Neurosurgery, National Neurosciences Centre, Calcutta, India.

Neurocirugia (English Edition)
|November 4, 2022
PubMed

Insights

Dorsal arachnoidal webs, though rare, can cause spinal cord issues like syringomyelia. Surgical removal of these webs can effectively resolve associated neurological symptoms.

Area of Science:

  • Neurosurgery
  • Neurology
  • Spinal Cord Imaging

Background:

  • Dorsal arachnoidal webs are rare thickenings of arachnoid tissue on the dorsal spinal cord.
  • They obstruct cerebrospinal fluid (CSF) flow, potentially causing syringomyelia and myelopathy.

Observation:

  • The "scalpel sign" on MRI is a key diagnostic indicator for dorsal arachnoidal webs.
  • A case report details a 58-year-old male with spastic paraparesis and upper limb pain due to a dorsal arachnoidal web.

Findings:

  • Surgical excision of the dorsal arachnoidal web led to complete resolution of the patient's symptoms.
  • This highlights the efficacy of surgical intervention for symptomatic webs.

Implications:

  • Dorsal arachnoidal webs should be considered in cases of "idiopathic" syringomyelia.
  • Early diagnosis and surgical treatment can prevent or reverse myelopathy and improve patient outcomes.
Keywords:
Arachnoid webColumna dorsalDorsal spineMielopatíaMyelopathyScalpel signSigno de bisturíSiringomieliaSyringomyeliaTelaraña aracnoidea

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