CT of diffuse leptomeningeal metastasis from primary extracerebral neuroblastoma.

Leptomeningeal metastasis due to primary extracerebral neuroblastoma is rare. Diffuse leptomeningeal contrast enhancement resulting from this condition has been demonstrated only in a recent case report utilizing cranial CT imaging. The case presented here is the second example of diffuse leptomeningeal metastasis from primary extracerebral neuroblastoma. Metastasis was visualized by pre- and postcontrast cranial CT scans 6 months after the diagnosis of the disease when the patient had developed multiple cranial nerve palsies.