Thyroid isthmus
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| Thyroid isthmus | |
|---|---|
 | |
| The thyroid gland and its relations. (Isthmus visible at center.) | |
| Latin | isthmus glandulae thyroideae |
| Gray's | subject #272 1270 |
| Dorlands/Elsevier | i_14/12462815 |
The thyroid isthmus connects together the lower thirds of the lobes; it measures about 1.25 cm. in breadth, and the same in depth, and usually covers the second and third rings of the trachea.
Its situation and size present, however, many variations.
In the middle line of the neck it is covered by the skin and fascia, and close to the middle line, on either side, by the Sternothyreoideus.
Across its upper border runs an anastomotic branch uniting the two superior thyroid arteries; at its lower border are the inferior thyroid veins.
Sometimes the isthmus is altogether wanting.
External links
- SUNY Figs 26:01-07 - "Diagram of the relationship of the thyroid gland to the larynx."
- Diagram (large)
- Diagram (small)
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
