Mediastinal ectopic thyroid is quite rare, occurring in less than 1%
of all ectopic thyroids. Frequent location of mediastinal ectopic thyroid in reported cases is
anterosuperior mediastinum. CT findings of ectopic thyroid can be various and
are dependent on several factors, such as its iodine content, the extent of tissue
degeneration, and the presence of colloid cysts. This is a case of right
paratracheal ectopic thyroid with nodular hyperplasia, mimicking metastatic
nodal mass on both CT and 18F-FDG
PET CT in a patient with colon cancer.
Cite this paper
S. Kim, "A Case of Right Paratracheal Ectopic Thyroid, Mimicking Metastasis on CT and 18F-FDG PET CT," Open Journal of Medical Imaging, Vol. 3 No. 3, 2013, pp. 82-85. doi: 10.4236/ojmi.2013.33012.
 S. Madjar and D. Weissberg, “Retrosternal Goiter,” Chest, Vol. 108, No. 1, 1995, pp. 78-82.
 M. L. White, G. M. Doherty and P. G. Gauger, “Evidence-Based Surgical Management of Substernal Goiter,” World Journal of Surgery, Vol. 32, No. 7, 2008, pp. 1285-1300. doi:10.1007/s00268-008-9466-3
 T. C. Gamblin, G. R. Jennings, D. B. Christie 3rd, W. M. Thompson Jr. and M. L. Dalton, “Ectopic Thyroid,” The Annals of Thoracic Surgery, Vol. 75, No. 6, 2003, pp. 1952-1953. doi:10.1016/S0003-4975(03)00007-9
 J. Sand, E. Pehkonen, J. Mattila, S. Seppanen and J. Salmi, “Pulsating Mass at the Sternum: A Primary Carcinoma of Ectopic Mediastinal Thyroid,” The Journal of Thoracic and Cardiovascular Surgery, Vol. 112, No. 3, 1996, pp. 833-835.
 E. Kousta, K. Konstantinidis, C. Michalakis, M. Vorias, G. Sambalis, M. Georgiou and G. E. Theodoropoulos, “Ectopic Thyroid Tissue in the Lower Neck with a Coexisting Normally Located Multinodular Goiter and Brief Literature Review,” Hormones (Athens), Vol. 4, No. 4, 2005, pp. 231-234.
 J. A. Bersaneti, R. D. Silva, R. R. Ramos, M. M. Matsushita and L. R. Souto, “Ectopic Thyroid Presenting as a Submandibular Mass,” Head and Neck Pathology, Vol. 5, No. 1, 2011, pp. 63-66. doi:10.1007/s12105-010-0209-z
 S. Basaria, W. H. Westra and D. S. Cooper, “Ectopic Lingual Thyroid Masquerading as Thyroid Cancer Metastases,” The Journal of Clinical Endocrinology & Metabolism, Vol. 86, No. 1, 2001, pp. 392-395.
 J. D. Rives, “Mediastinal Aberrant Goiter,” Annals of Surgery, Vol. 126, No. 5, 1947, pp. 797-810.
 P. Vadasz and L. Kotsis, “Surgical Aspects of 175 Mediastinal Goiters,” European Journal Cardio-Thoracic Surgery, Vol. 14, No. 4, 1998, pp. 393-397.
 R. Prakash, N. Lakshmipathi, A. Jena, V. Behari and M. K. Chopra, “Hyperthyroidism Caused by a Toxic Intrathoracic Goiter with a Normal-Sized Cervical Thyroid Gland,” Journal of Nuclear Medicine, Vol. 27, No. 9, 1986, pp. 1423-1427.
 H. S. Glazer, P. L. Molina, M. J Siegel and S. S. Sagel, “High-Attenuation Mediastinal Masses on Unenhanced CT,” American Journal of Roentgenology, Vol. 156, No. 1, 1991, pp. 45-50. doi:10.2214/ajr.156.1.1898569
 J. A. Buckley and P. Stark, “Intrathoracic Mediastinal Thyroid Goiter: Imaging Manifestations,” American Journal of Roentgenology, Vol. 173, No. 2, 1999, pp. 471-475. doi:10.2214/ajr.173.2.10430156
 K. L. Chakraborti, G. Sripathy and T. Sekhri, “Imaging in a Case of Thyrotoxicosis” Indian Journal of Nuclear Medicine, Vol. 20, No. 1, 2005, pp. 14-16.
 C. N. Foroulis, K. S. Rammos, M. N. Sileli and C. Papakonstantinou, “Primary Intrathoracic Goiter: A Rare and Potentially Serious Entity,” Thyroid, Vol. 19, No. 3, 2009, pp. 213-218.
 T. Y. Kim, W. B. Kim, J. S. Ryu, G Gong, S. J. Hong and Y. K. Shong, “18F-Fluorodeoxyglucose Uptake in Thyroid from Positron Emission Tomogram (PET) for Evaluation in Cancer Patients: High Prevalence of Malignancy in Thyroid PET Incidentaloma,” Laryngoscope, Vol. 115, No. 6, 2005, pp. 1074-1078.
 C. R. McHenry, F. Paras Jr., Y. C. Liu and M. Rodgers, “Acute Suppurative Thyroiditis in a Primary Intrathoracic Goiter,” Endocrine Practice, Vol. 3, No. 1, 1997, pp. 14- 18.
 M. Nervi, P. Iacconi, C. Spinelli, A. Janni and P. Miccoli, “Thyroid Carcinoma in Intrathoracic Goiter,” Langenbeck’s Archives of Surgery, Vol. 383, No. 5, 1998. pp. 337-339. doi:10.1007/s004230050144
 G. Noussios, P. Anagnostis, D. G. Goulis, D. Lappas and K. Natsis, “Ectopic Thyroid Tissue: Anatomical, Clinical, and Surgical Implications of a Rare Entity,” European Journal of Endocrinology, Vol. 165, No. 3, 2011, pp. 375-382.