The most common tumor to develop in the jugular foramen is a paraganglioma (glomus jugulare). Paragangliomas in the skull base are ubiquitous in their distribution and arise from paraganglia or glomus cells situated at the following sites:
(1) in the adventitia of the jugular bulb beneath the floor of the middle ear
(2) in the bony walls of the tympanic canals related to the tympanic branches of the IX and X nerves
(3) in the bone of the promontory, close to the mucosal lining of the middle ear.
Imaging studies are necessary to depict the location and extent of tumor involvement, to help determine the surgical approach, and to predict operative morbidity and mortality.1