Case report Intracranial laterally based supratentorial neurenteric cyst

Neurenteric cysts are rare developmental cysts lined by endodermal derived epithelium. We present the case of a 68-year-old patient presenting with seizures who was found to have an extra-axial low density lesion with associated wall calcification on CT. Aspiration and biopsy of the cyst revealed a neurenteric cyst. Such lesions of the lateral supratentorial convexity are extremely rare and calcification has not been previously reported in these intracranial cysts. Neurenteric cysts are uncommon developmental cysts lined by endodermal derived epithelium, which are very rarely found intracranially. There is some controversy in the literature in the nomenclature of these lesions. In fact the term neurenteric, endodermal, enterogenous or even epithelial-lined and respiratory cyst are used interchange- ably. However, in recent years the term neurenteric cyst has gained increasing support in the neuropathological terminology (1) and is the term used in this paper. Here we report a case of a neurenteric cyst centred on the lateral supratentorial convexity, a location only described on two previous occasions (2, 3). The calcification noted in the wall of this lesion has not been previously been reported in association with such a lesion.