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WHO Classification of Tumours
Jugulotympanic paraganglioma
Adrenal gland


Jugulotympanic paraganglioma is a benign or malignant extra-adrenal parasympathetic paraganglioma arising from paraganglia in the base of the skull and middle ear
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Ronald A. DeLellis, Ricardo V. Lloyd, Philipp U. Heitz, Charis Eng
World Health Organization Classification of Tumours. Pathology and Genetics of Tumors of Endocrine Organs
IARC Press: Lyon 2004


Jugulotympanic and carotid body tumours are the two most frequent, followed by vagal or aortic lesions.
Jugolotympanic paraganglioma can be quite small and located on the promontory of the middle ear or it can be larger, filling the cavity of the middle ear and protruding through the tympanic membrane. More than one third of jugulotympanic paragangliomas present as a bluish mass behind the tympanic membrane or as a polyp in the external ear canal and a casual biopsy can lead to troublesome bleeding.