Title: Imaging Diagnosis of Paragangliomas in Head and Neck
Abstract:Objective:To analyze the imaging features of the head and neck paraganglioma.Methods:The images of 19 cases of head and neck paraganglioma (3 glomus jugular tumor,2 glomus tympanicum tumor,12 carotid ...Objective:To analyze the imaging features of the head and neck paraganglioma.Methods:The images of 19 cases of head and neck paraganglioma (3 glomus jugular tumor,2 glomus tympanicum tumor,12 carotid body tumor and 3 vagal paraganglioma) were retrospectively reviewed.Results:On CT scans of the temporal bones,expansion and moth-eaten pattern of erosion of the jugular foramen characterize the glomus jugular tumor.A tumor smaller than 1cm in a patient with bilateral glomus jugular tumors was missed at the first MRI study.The glomus tympanicum tumor manifested as a small discrete intensely enhanced mass arising from the cochlear promontory and confined to the tympanic cavity.The classic clinical manifestations of the glomus tympanicum tumor were pulsatile tinnitus and hyperemic tympanic membrane.The carotid body paragangliomas located at the bifurcation of the carotid artery with the splaying and enchasing of the external and internal carotid artery.In vagal paraganglioma the carotid arteries were found dislocated anteriomedially.All tumors were hypervascular solid tumors with marked enhancement.MR angiography may be useful in defining the flow-related enhancement of feeding vessels in lesions except glomus tympanicum tumor.Preoperative embolization was a useful tool for the treatment.The shrinkage in tumor vascularity following preoperative embolization was estimated at about 50%~70% on DSA.Conclusion:There are characteristic radiological signs in paragangliomas at definite locations.For most cases,a reliable diagnosis can be made when combined with clinical information.Read More
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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