Avascular tympanojugular paraganglioma.

The avascular paraganglioma described in this article appears to be the second such tumor reported in the international literature and the first to be reported in the tympanojugular region. Despite a highly suggestive history and clinical appearance, the tumor showed no signs of vascularization on radiologic studies. The pathologic postoperative study confirmed the diagnosis of paraganglioma with extensive stromal fibrosclerosis and without the typical well-vascularized thin fibrous septa. In the authors' opinion, this observation is notable because of the difficulties encountered in the correct diagnostic interpretation of an avascular mass in the tympanojugular region. In such cases, the possibility of a paraganglioma should always be considered.