Picture Quiz: An unusual cause of headache – Answers

The MRI images (see page 27) show lobulated meningeal thickening along the medial aspect of the right middle cranial fossa extending into sylvian fissure, suprasellar cistern, interpenduncular cistern and roof of 4th ventricle which enhanced on postcontrast images. These appearances are diagnostic of metastatic leptomeningeal carcinomatosis.