Figure 4.

Permanent balloon occlusion (PBO) of internal carotid artery (ICA) in class C4 recurrent jugular paraganglioma after bypass (Table 1, case 9). (A,B) Axial postgadolinium T1-weighted image shows extension of tumor along horizontal segment of left ICA, anterior foramen lacerum, and Meckel's cave. Intracranial intradural extension in the left cerebellopontine angle, with compression of the middle cerebellar peduncle and contralateral displacement of the pons and fourth ventricle, is also evident.