title: Ectopic sequestered thyroid tissue: an unusual cause of a mediastinal mass.
abstract: An 80-year-old female presented with an incidental finding of a retrosternal mass on magnetic resonance imaging. Ultrasound demonstrated a mediastinal lesion adjacent to but separate from the inferior pole of the right thyroid lobe. Fine needle aspiration cytology demonstrated colloid and follicular cells. At surgery, the right thyroid lobe was found to be normal. A discrete 5 cm nodule was found in the anterior mediastinum separate from the thyroid and just anterior and to the right of the trachea and thymus. The nodule had a vascular pedicle arising from the mediastinum. The differential diagnosis included metastatic thyroid carcinoma. Histology was consistent with a benign ectopic sequestered thyroid nodule. Extensive investigations demonstrated no sign of a thyroid malignancy.
authors.affiliation: Department of Otolaryngology, Charing Cross Hospital, Imperial College Healthcare NHS Trust, Fulham Palace Road, London W6 8RF, UK.
authors.forename: A D
authors.initials: AD
authors.lastname: Mace
authors.forename: A
authors.initials: A
authors.lastname: Taghi
authors.forename: S
authors.initials: S
authors.lastname: Khalil
authors.forename: A
authors.initials: A
authors.lastname: Sandison
references.citation: G Chir. 2001 Mar;22(3):85-8
references.pmid: 11284171
references.citation: Ann Surg. 1994 Jul;220(1):91-6
references.pmid: 8024364
references.citation: Ear Nose Throat J. 2007 Jul;86(7):406-8, 418
references.pmid: 17702322
references.citation: Schweiz Med Wochenschr. 1997 Feb 15;127(7):266-70
references.pmid: 9157532
references.citation: Thyroid. 2005 May;15(5):478-84
references.pmid: 15929670
references.citation: J Laryngol Otol. 2003 Sep;117(9):739-40
references.pmid: 14561369
references.citation: Am Surg. 1998 Apr;64(4):305-6
references.pmid: 9544138
references.citation: Cases J. 2008 Jul 21;1(1):53
references.pmid: 18644151
references.citation: J Otolaryngol. 1979 Dec;8(6):523-30
references.pmid: 529362
references.citation: Ann Diagn Pathol. 2004 Apr;8(2):61-8
references.pmid: 15060882
references.citation: Singapore Med J. 2004 Sep;45(9):437-8
references.pmid: 15334289
references.citation: Otolaryngol Head Neck Surg. 1988 Sep;99(3):338-40
references.pmid: 3141876
references.citation: Surg Today. 2002;32(2):148-50
references.pmid: 11998943
references.citation: BMC Urol. 2006 Aug 10;6:18
references.pmid: 16899136
references.citation: Thyroid. 1999 Sep;9(9):955-8
references.pmid: 10524576
references.citation: Thyroid. 2000 Apr;10(4):363-5
references.pmid: 10807066
references.citation: Ann Otol Rhinol Laryngol. 1996 Dec;105(12):996-1000
references.pmid: 8973289
references.citation: Thyroid. 2005 Sep;15(9):1095-7
references.pmid: 16187921
references.citation: Ear Nose Throat J. 2008 Aug;87(8):476-7
references.pmid: 18712699