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Updated: Sep 4, 2025

Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
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Endodermal cyst: rare intraaxial brainstem location. Illustrative cases.

Atul Goel1, Dikpal Jadhav1, Abhidha Shah1

  • 1Departments of Neurosurgery and.

Journal of Neurosurgery. Case Lessons
|July 20, 2022
PubMed
Summary

This report details a rare intraaxial brainstem endodermal cyst in two young patients. Surgical evacuation and resection led to complete symptom resolution, offering a positive long-term prognosis.

Keywords:
brainstemendodermal cystneurenteric cyst

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Area of Science:

  • Neuro-oncology
  • Pediatric Neurosurgery
  • Diagnostic Imaging

Background:

  • Endodermal cysts are rare intraaxial brainstem lesions.
  • Their unusual location can mimic other pathologies, causing diagnostic challenges.
  • Early identification is crucial for effective surgical management and patient outcomes.

Observation:

  • Two pediatric patients presented with ataxia and diplopia.
  • Imaging revealed intraaxial brainstem lesions.
  • Surgical intervention involved evacuation of purulent fluid and cyst wall resection.

Findings:

  • Histological analysis confirmed the lesions as endodermal cysts.
  • Both patients experienced complete resolution of symptoms post-surgery.
  • Patients remained symptom-free at 24 and 72 months follow-up.

Implications:

  • Endodermal cysts are benign, long-standing lesions within the brainstem.
  • Surgical management can lead to excellent long-term outcomes.
  • This case highlights the importance of considering endodermal cysts in the differential diagnosis of pediatric posterior fossa masses.