• Childs Nerv Syst · May 1997

    Review Case Reports

    Posttraumatic intradiploic arachnoid cyst of the posterior fossa.

    • J F Martínez-Lage, M Martínez Pérez, R Domingo, and M Poza.
    • Regional Neurosurgical Service, Virgen de la Arrixaca University Hospital, National Health Service, Murcia, Spain.
    • Childs Nerv Syst. 1997 May 1; 13 (5): 293-6.

    AbstractWe report the case of a 5-year-old girl with an enlarging suboccipital mass, a posttraumatic intraosseous arachnoid cyst. Diagnostic work-up revealed that the lesion consisted of an intradiploic arachnoid cyst and an extra-axial occipital pouch that communicated by way of an osseous and dural defect. Surgical repair was undertaken with good results. A search of the current literature has shown only seven previous reports of leptomeningeal cysts situated at the occipital bones, most of them the result of an antecedent skull fracture. A pathogenetic hypothesis is presented comparing the growth of arachnoid intraosseous cysts and the development of meningocencephaloceles.

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