LEPTOMENINGEAL DISSEMINATION OF JUVENILE PILOCYTIC ASTROCYTOMA - CASE-REPORT

The authors report a case of leptomeningeal spinal metastasis of chias matic juvenile pilocytic astrocytoma. A 7-year-old boy underwent surge ry and radiation therapy for a chiasmatic pilocytic astrocytoma. Three years later he experienced a syndrome of medullary compression. A lum bosacral intradural extra-axial tumor was discovered and subtotally ex cised. Pathologic examination revealed a metastasis of the chiasmatic tumor without any evidence of malignant transformation. Only five case s of leptomeningeal spinal dissemination of pilocytic astrocytoma have been previously reported. The authors review and discuss the clinical and pathologic features of these cases.