A benign or malignant paraganglioma arising from sympathetic or parasympathetic paraganglia outside the adrenal gland.
Thyroid paragangliomas are rare tumours
LaGuette J, Matias-Guiu X, Rosai J (1997)
. All cases have occurred in females.
Thyroid paraganglioma: a clinicopathologic and immunohistochemical study of three cases.
Am J Surg Pathol 21: 748-53
In all reported cases, thyroid paragangliomas have behaved as benign neoplasms
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