2.  In the neck  Inferior to larynx  Anterolateral structure

5.  Aorta  Brachiocephalic  Left Common carotid  Left Subclavian artery

6.  Aorta   (RHS brachiocephalic  Lhs direct)  common carotid   external carotid   superior thyroid artery  (RHS brachiocephalic, LHS aorta)   Subclavian   thyrocervical trunk   inferior thyroid artery

7.  Superior & middle thyroid drain to internal jugular (to subclavian to brachiocephalic)  Inferior thyroid into brachiocephalic veins

8.  Starts life on the tongue and descends via the thyroglossal duct Thyroglossal duct cysts Can form anywhere along the thyroglossal duct in the midline neck. Move on swallowing and tongue protrusion The thyroid gland and lumps tends to move during swallowing but not always with tongue protrusion.

10. Increased gland growth high TSH low T 4 Iodine deficiency T4T4 TSH + decreased T 4 secretion Adapted from Endocrinology Physiology. SP Porterfield, Mosby

11. + Increased T 4 secretion - - Increased gland growth Low TSH high T 4 Graves disease Adapted from Endocrinology Physiology. SP Porterfield, Mosby T4T4 TSH TSI thyroid stimulating immunoglobulin