Abstract
Heterotopia of the thyroid gland is veryuncommon. Ectopic thyroid results from embryologicaberration characterized by the existence ofthyroid tissue in a site other than its usual locationanterior to the trachea. Ectopic thyroid tissue isusually found along the path of initial descent ofthe thyroid, representing a failure of the thyroidto descend completely. Thyroid ectopia mayalso be found in locations other than the typicalpathway of embryologic descent. It is importantto consider ectopic thyroid as a differentialdiagnosis when a mass is discovered in the neck,chest, or, rarely, other locations.
References
1.
1.
Tewfik TL
,
Yoskovitch A
: Congenital malformations , neck. E Medicine. Retrieved June 28, 2003 , from http://www.emedicine.com/ent/topic323.htm
2.
2.
Baik SH
,
Choi JH
,
Lee HM
: Dual ectopic thyroid . EurArch Otorhinolaryngol
2002 ;259 (2 ): 105 –107 .
3.
3.
Kay DJ
,
Goldsmith AJ
: Embryology of the thyroid andparathyroids . E Medicine. Retrieved June 28, 2003 , from http://www.emedicine.com/ent/topic534.htm
4.
4.
Harach HR
: Ectopic thyroid tissue adjacent to thegallbladder . Histopathology
1998 ;32 (1 ): 90 –91 .
5.
5.
Galizia G
,
Lieto E
,
Ferrara A
,
Castellano P
,
Pelosio
, et al: Ectopic thyroid: report of a case . G Chir
2001 ;22 (3 ): 85 –88 .
6.
6.
Baykut D
,
Fiegen U
,
Krian A
,
Thiel A
: Ectopic thyroidtissue in the left ventricular outflow tract . Ann Thorac Surg
2000 ;69 (2 ): 620 –621 .
7.
7.
Bando T
,
Genka K
,
Ishikawa K
,
Kuniyoshi M
,
Kuda T
: Ectopic intrapulmonary thyroid . Chest
1993 ;103 (4 ): 1278 –1279 .
8.
8.
Eyuboglu E
,
Kapan M
,
Ipek T
,
Ersan Y
,
Oz F
: Ectopicthyroid in the abdomen: report of a case . Surg Today
1999 ;29 (5 ): 472 –474 .
9.
9.
Spinner RJ
,
Moore KL
,
Gottfried MR
,
Lowe JE
,
Sabiston DC
: Thoracic intrathymic thyroid . Ann Surg
1994 ;220 (1 ): 91 –96 .
10.
10.
Sambola-Cabrer I
,
Fernandez-real JM
,
Ricart W
,
Barbas JF
,
Olle M
,
Teruel J
: Ectopic thyroid tissue presenting asa submandibular mass . Head Neck
1996 ;18 (1 ): 87 –90 .
11.
11.
Shiraishi T
,
Imai H
,
Fukutome K
,
Watanabe M
,
Yatani R
: Ectopic thyroid in the adrenal gland . Hum Pathol
1999 ;30 (1 ): 105 –108 .