A Case of Ectopic Thyroid Presenting as a Superior Mediastinal Mass

We report a very rare case of an ectopic thyroid in the superior mediastinum, which was detected incidentally using imaging. The case was a 50-year-old woman patient. She had an orthotopic thyroid and normal thyroid function. This superior mediastinum mass obviously lacked continuity with the orthotopic thyroid. Its computed tomography density was lower than that of the orthotopic thyroid, and an enhancement was heterogeneously observed. In the cytodiagnosis, only large and small lymphocytes were observed, and malignant diseases such as malignant lymphoma could not be ruled out, so surgical resection was performed through a cervical incision. Combined resection of the thyroid was unnecessary, and ligation of the feeding vessels from the thorax side was able to be carried out without incident.

[1]  Hassan Alyami,et al.  Mediastinal ectopic thyroid mass with normal thyroid function and location: Case report , 2018, International journal of surgery case reports.

[2]  T. de Giacomo,et al.  Diagnosis and management of a mediastinal ectopic thyroid laying on the right bronchus: case report and review of literature , 2018, BMC Surgery.

[3]  G. Colella,et al.  Prevalence, diagnosis and management of ectopic thyroid glands. , 2016, International journal of surgery.

[4]  M. Sharma,et al.  Primary Ectopic Mediastinal Goiter in a Patient With Crohn's Disease Presenting as Myasthenia Gravis. , 2015, The Annals of thoracic surgery.

[5]  R. Andresen,et al.  Ectopic Mediastinal Thyroid Tissue With a Normally Located Thyroid Gland , 2014, Iranian journal of radiology : a quarterly journal published by the Iranian Radiological Society.

[6]  E. Roh,et al.  A case of mediastinal ectopic thyroid presenting with a paratracheal mass , 2013, The Korean journal of internal medicine.

[7]  P. Walz,et al.  Ectopic mediastinal goiter successfully managed via cervical approach: Case report and review of the literature , 2013, Head & neck.

[8]  D. Goulis,et al.  Ectopic thyroid tissue: anatomical, clinical, and surgical implications of a rare entity. , 2011, European journal of endocrinology.

[9]  A. Sandison,et al.  Ectopic Sequestered Thyroid Tissue: An Unusual Cause of a Mediastinal Mass , 2011, ISRN surgery.

[10]  G. Theodoropoulos,et al.  Ectopic thyroid tissue in the lower neck with a coexisting normally located multinodular goiter and brief literature review. , 2005, Hormones.

[11]  J. Lim-Dunham,et al.  Sonographic demonstration of a normal thyroid gland excludes ectopic thyroid in patients with thyroglossal duct cyst. , 1995, AJR. American journal of roentgenology.

[12]  K. L. Moore,et al.  Thoracic Intrathymic Thyroid , 1994, Annals of surgery.

[13]  K. Azarow,et al.  Primary mediastinal masses. A comparison of adult and pediatric populations. , 1993, The Journal of thoracic and cardiovascular surgery.

[14]  L. Woolner,et al.  Lingual thyroid. Clinical characteristics of 15 cases. , 1973 .

[15]  J. Sauk.  Ectopic lingual thyroid , 1970, The Journal of pathology.

[16]  Ming-Hsun Wu,et al.  Primary intrathoracic goiter. , 2006, Journal of the Formosan Medical Association = Taiwan yi zhi.

[17]  C. Baamonde,et al.  Ectopic goiters of the mediastinum: Presentation of two cases and review of the literature , 2006, The Japanese journal of surgery.

[18]  W. M. Thompson,et al.  Ectopic thyroid. , 2003, The Annals of thoracic surgery.

[19]  R. Lecesne,et al.  Mediastinal masses: diagnostic approach , 1998, European Radiology.

[20]  C. Reed,et al.  Intrathoracic aberrant thyroid: identification critical for appropriate operative approach. , 1998, The American surgeon.