Glomus Faciale, Glomus Jugulare, Glomus Tympanicum, Glomus Vagale, Carotid Body Tumors, and Simulating Lesions: Role of MR Imaging - Glomus complex tumors (paragangliomas) of the temporal bone are classified as either glomus jugulare or glomus tympanicum, depending on their sites of origin. Glomus jugulare tumors arise from the glomus bodies around the jugular bulb and along the course of either Jacobson's nerve, the tympanic branch of the glossopharyngeal nerve or Arnold's nerve, the auricular branch of the vagus nerve. Glomus tympanicum tumors arise from the glomus bodies along the course of Jacobson's nerve as it courses from the tympanic canaliculus over the promontory. Glomus faciale tumors are another rare and interesting type of paragangliomas of the temporal bone that arise from glomus bodies along the course of Arnold's nerve into the fallopian canal. Glomus vagale tumors arise from glomus bodies at the bifurcation of the carotid artery. It is the purpose of this article to pr
