Cerebral leptomeningeal cysts of developmental origin.

The pathogenesis of nontraumatic cerebral leptomeningeal cysts has seldom been documented. Clinical, roentgenologic and anatomic observations in a single case are presented. The cyst did not communicate with the subarachnoid space, and evidence favored an intra-arachnoid cyst of developmental origin. Clinical and roentgenologic features of this variety of leptomeningeal cyst should permit preoperative recognition.

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