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Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
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Spinal dermal sinus and pseudo-dermal sinus tracts: two different entities.

Juan F Martínez-Lage1, María José Almagro, Belén Ferri-Ñiguez

  • 1Regional Service of Neurosurgery, Virgen de la Arrixaca University Hospital, El Palmar, 30120, Murcia, Spain. juanf.martinezlage@cablemurcia.com

Child'S Nervous System : Chns : Official Journal of the International Society for Pediatric Neurosurgery
|October 28, 2010
PubMed
Summary

Occult spinal dysraphism presents with distinct skin lesions. True dermal sinus tracts (DST) risk infection and require urgent surgery, while pseudo-DSTs typically show neurological symptoms without immediate surgical need.

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Area of Science:

  • Pediatric Neurosurgery
  • Spinal Dysraphism Research
  • Dermatology

Background:

  • Occult spinal dysraphism (OSD) includes various congenital conditions affecting the spine.
  • A dermal sinus tract (DST) is a skin opening connected to deep structures, posing a significant infection risk.
  • Pseudo-dermal sinus tracts (pseudo-DSTs) are similar lesions but lack a lumen and differ clinically.

Purpose of the Study:

  • To differentiate between true DST and pseudo-DST based on clinical presentation, outcomes, and infectious risk.
  • To analyze the distinct behaviors and management implications of these two types of spinal skin lesions.

Main Methods:

  • Review of clinical features in 20 patients with spinal skin orifices.
  • Classification into two groups: true DST (Group 1) and pseudo-DST (Group 2).
  • Comparison of clinical presentation, neuroimaging findings, and histopathology between the groups.

Main Results:

  • Group 1 (true DST) patients (n=8) presented with infections and required urgent surgery.
  • Group 2 (pseudo-DST) patients (n=12) primarily showed neurological symptoms and skin lesions, with no preoperative infections.
  • Histopathology confirmed true DST as hollow, epithelial-lined tracts and pseudo-DST as solid fibrous tracts.

Conclusions:

  • Dermal sinus tracts (DST) are clinicopathologically distinct entities.
  • True DST and pseudo-DST exhibit different clinical behaviors, necessitating varied management approaches.
  • Infection risk and urgency of surgical intervention differ significantly between true DST and pseudo-DST.