TY  - JOUR
A1  - ,  
T1  - Agenesis of isthmus of thyroid gland and ectopic locations of the inferior parathyroid glands and thymus
JO  - Eur. J. Anat.
SN  - 1136-4890
Y1  - 2008
VL  - 12
SP  - 127
EP  - 132
UR  - http://www.eurjanat.com/web/paper.php?id=08020127
KW  - aged
KW  - anatomical variation
KW  - article
KW  - cadaver
KW  - case report
KW  - ectopic organ
KW  - ectopic thymus
KW  - female
KW  - histopathology
KW  - human
KW  - human tissue
KW  - mediastinum
KW  - neck dissection
KW  - parathyroid ectopia
KW  - thyroid dysgenesis
KW  - thyroid follicle
N2  - The aim of this study is to report a case of agenesis of the isthmus of the thyroid gland, and ectopic locations of the inferior parathyroid glands and thymus observed in an 80-year old female cadaver during routine dissection of the head and neck. The two lobes of the thyroid gland were small and connected by pretracheal fascia at the midline, which upon histological study were seen to contain mainly connective tissue, with a few minute follicles laterally. A 2.5-cm-long portion of glandular tissue was seen posterior to the left lobe, which upon histological study proved to be an ectopic thymus with cysts. The location of the superior parathyroid glands was normal. The right inferior parathyroid gland was situated close and anteriorly to the inferior pole of the right lobe. The left inferior parathyroid gland was seen within the thymus in the superior mediastinum. Ectopic locations of the inferior parathyroid gland and the thymus have been attributed to abnormal migration during embryogenesis and common origin from the third pouch.
ER  -