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Anatomy of the Thyroid and Parathyroid Glands

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benryan95's version from 2015-05-09 09:31

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Question Answer
Which vertebral level is the hyoid bone located at?C3
Which vertebral level is the thyroid cartilage located at?C4-C5
Which vertebral level is the cricoid cartilage located at?C6-C7
At which vertebral levels is the thyroid gland located?C5-T1
What are the anterolateral relations of the lobes of the thyroid gland?Sternothyroid, sternohyoid
What are the posterolateral relations of the lobes of the thyroid gland?Inferior pharyngeal constrictor, cricothyroid
What are the medial relations of the lobes of the thyroid gland?Larynx, Oesophagus, Trachea, External laryngeal nerve
What are the anterior relations of the isthmus of the thyroid gland?Sternothyroid and sternohyoid
What are the posterior relations of the isthmus of the thyroid gland?Trachea, oesophagus and larynx
Where does the superior thyroid artery arise from?External carotid artery behind hyoid bone
Where does the inferior thyroid artery arise from?Thyrocervical trunk of subclavian
What % of people have a thyroid ima artery?10%
Where does the thyroid ima artery arise from?Bracheocephalic trunk
What it is the clinical significance of a thyroid ima artery?It can cause problems during thyroidectomy and tracheostomy
Where does the superior thyroid vein drain into?Internal Jugular Vein
Where does the middle thyroid vein drain into?Internal Jugular Vein
Where does the inferior thyroid vein drain into?Bracheocephalic Vein
Which lymph nodes drain the thyroid gland?Paratracheal and Deep Cervical Lymph nodes
Where does the Right Jugular Trunk drain into?Right lymphatic duct
Where does the Left Jugular Trunk drain into?Thoracic duct
Why can the thyroid gland not spread in a superior direction when enlarged?Due to the superior attachments of sternothyroid (and sternohyoid)?
What do follicular cells secrete?T3 and T4
What substance fills the follicles?Colloid
What do parafollicular cells (C cells) secrete?Calcitonin
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