Chiasmatic low-grade glioma presenting with sacral intradural spinal metastasis

Leptomeningeal metastasis of low-grade gliomas in children has been documen ted in several series, both at the time of diagnosis and at relapse. The au thors report a unique case of chiasmatic low-grade astrocytoma presenting w ith signs and symptoms related to the metastatic site rather than the prima ry site. In this respect, the possibility of appearance of symptoms and sig ns related to leptomeningeal dissemination preceding the signs and symptoms belonging to the primary site should be considered in this type of benign rumours.