Volume : 7, Issue : 9, September - 2018

ABSENCE OF ISTHMUS AND LEFT INFERIOR THYROID ARTERY - A CASE REPORT

Dr. G. Praveen Kumar

Abstract :

In routine dissection classes in the Department of Anatomy a male cadaver showed the absence of Isthmus or Median lobe of the thyroid gland.  In the same cadaver left inferior thyroid artery was absent.  In addition, a pyramidal lobe and levator glandulae thyroideae was also seen arising from the right lobe.The Isthmus connects the two lateral lobes of the thyroid gland and lies over the second, third and fourth tracheal rings.  In the present cadaver it was absent.  The Inferior thyroid artery commonly arises from the thyrocervical trunk, passes posterior to the carotid sheath and supplies the inferior pole of the corresponding lobe of the thyroid gland, its anches can course anterior or posterior to or between the anches of the recurrent laryngeal nerve.  In the present cadaver the inferior thyroid artery on the left side was absent.  The left superior thyroid artery arose from external carotid artery and ramified over whole of the left lobe of the thyroid gland to supply it.<o:p></o:p>  The pyramidal lobe of the thyroid gland is the remnant of caudal end of the thyroglossal duct and in the present cadaver it arose from the right lobe of the thyroid gland.<o:p></o:p>

Keywords :

Isthmus Inferior Thyroid artery Right lobe Thyrocervical Trunk Thyroglossal duct

Article:

Download PDF Journal DOI : 10.15373/2249555X

Cite This Article:

Dr.G.Praveen Kumar, ABSENCE OF ISTHMUS AND LEFT INFERIOR THYROID ARTERY‾A CASE REPORT, GLOBAL JOURNAL FOR RESEARCH ANALYSIS : Volume-7 | Issue-9 | September-2018