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47‐YEAR‐OLD WOMAN WITH A CLIVAL MASS

A CT of the head revealed a destructive, marrow-replacing midline to right-sided lesion of the clivus (Figure 1) expanding to the right petrous internal carotid artery segment and eroding the right petrous apex. This was confirmed by MRI which showed the lesion to be iso-intense to hypo-intense on T1-weighted images (Figure 2) and hypo-intense to hyper-intense on T2-weighted images (Figure 3). The post-gadolinium MRI showed heterogeneous enhancement (Figure 4). The MRI also showed involvement of the extradural space in the prepontine region. After administration of contrast material no further intracerebral lesions were found. Neuroimaging differential included chordoma, chondroma and chondrosarcoma. SURGICAL TREATMENT AND POSTOPERATIVE COURSE