Lateral thyroid ectopia

Document Type: Case Report

Authors

Department of Nuclear Medicine & PET/CT, Amrita Institute of Medical Sciences, Cochin, Kerala, India

Abstract

We report here a rare case of lateral ectopia of thyroid without orthotopic thyroid tissue in an Indian teenager, who was referred to our department for a thyroid scintigraphy. Technetium Pertechnetate (99mTcO4- ) scan showed uptake in laterally placed soft tissue structure along with functioning thyroid tissue in high anterior midline neck region in line with thyroglossal tract. There is no uptake in the normal anatomical thyroid bed region. Ultrasound study of the neck confirmed a soft tissue structure on the right of midline appearing coarse in echotexture with internal vascularity and absent native thyroid gland. Ectopic thyroid tissue lateral to midline associated with thyroglossal tract remnant and absence of orthotopic thyroid tissue is known to be very rare.

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Neinas FW, Gorman CA, Devine KD, Woolner LB. Lingual thyroid. Clinical characteristics of 15 cases. Ann Intern Med. 1973 Aug;79(2):205-10.

Amoodi HA, Makki F, Taylor M, Trites J, Bullock M, Hart RD. Lateral ectopic thyroid goiter with a normally located thyroid. Thyroid. 2010 Feb;20(2):217-20.

Sevinç AI, Unek T, Canda AE, Guray M, Kocdor MA, Saydam S, Harmancioglu O. Papillary carcinoma arising in subhyoid ectopic thyroid gland with no orthotopic thyroid tissue. Am J Surg. 2010 Jul;200(1):e17-8.

Chawla M, Kumar R, Malhotra A. Dual ectopic thyroid: case series and review of the literature. Clin Nucl Med. 2007 Jan;32(1):1-5.

Yang Y, Li Q, Qu J, Xiang Y, Pan Y, Liao Z, Zhang X. Ectopic intratracheal thyroid. South Med J. 2010 May;103(5):467-70.

Scrofani R, Rossi RS, Antona C. Ectopic thyroid in the right ventricle. J Cardiovasc Med (Hagerstown). 2011 Sep;12(9):689-91.

Cassol CA, Noria D, Asa SL. Ectopic thyroid tissue within the gall bladder: case report and brief review of the literature. Endocr Pathol. 2010 Dec;21(4):263-5.

Mansberger AR Jr, Wei JP. Surgical embryology and anatomy of the thyroid and parathyroid glands. Surg Clin North Am. 1993 Aug;73(4):727-46.

Paresi RJ Jr, Shah D. Hashimoto's thyroiditis presenting as an enlarging submandibular mass in a patient with a lingual thyroid. Otolaryngol Head Neck Surg. 2005 May;132(5):806-8.

Okstad S, Mair IW, Sundsfjord JA, Eide TJ, Nordrum I. Ectopic thyroid tissue in the head and neck. J Otolaryngol. 1986 Feb;15(1):52-5.

Hollander EJ, Visser MJ, van Baalen JM. Accessory thyroid gland at carotid bifurcation presenting as a carotid body tumor: case report and review of the literature. J Vasc Surg. 2004 Jan;39(1):260-2.