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Protruding arachnoid granulations mimicking dermoid cysts
R M Beatty1, G W Hornig, E J Hanson
1Department of Surgery, Children's Mercy Hospital, University of Missouri, Kansas City 64108.
Journal of Pediatric Surgery
|April 1, 1989
Summary
Prominent arachnoid granulations in children can mimic dermoid cysts. Pathologic examination confirmed these midline, posterior lesions connected by a stalk to be arachnoid granulations.
Area of Science:
- Pediatric Neurosurgery
- Neuroradiology
- Surgical Pathology
Background:
- Arachnoid granulations are normal structures in the brain that absorb cerebrospinal fluid.
- Dermoid cysts are congenital tumors that can occur in the midline of the skull.
- Misdiagnosis can lead to unnecessary surgical intervention.
Observation:
- Two pediatric cases presented with midline, posterior lesions.
- Clinically, these lesions were suspected to be dermoid cysts.
- Surgical exploration revealed lesions extending through the dura via a stalk.
Findings:
- Histopathological examination confirmed the lesions as arachnoid granulations.
- Arachnoid granulations can present as prominent, midline, posterior masses.
- These lesions can mimic neoplastic or cystic lesions in children.
Implications:
- Highlights the importance of considering arachnoid granulations in the differential diagnosis of midline pediatric intracranial masses.
- Emphasizes the need for careful preoperative evaluation to avoid misdiagnosis.
- Suggests that prominent arachnoid granulations may require surgical intervention for definitive diagnosis and management.