Dissection of anterior and lateral regions of neck

Left lobe of thyroid gland in situ, anterior view

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Image #74-6

Dissection of anterior and lateral regions of neck

Left lobe of thyroid gland in situ, anterior view

The sternothyroid muscle has been divided and reflected to expose the isthmus and left lobe of the thyroid gland. A thin layer of fascia (pretracheal fascia) is adherent to the gland.

1. Depressor anguli oris muscle
2. Mandible
3. Submental lymph node
4. Body hyoid bone (covered by fibrous tissue)
5. Levator muscle of thyroid gland
6. Sternocleidomastoid muscle
7. Sternohyoid muscle right
8. Pyramidal lobe of thyroid gland
9. Prelaryngeal lymph node
10. Left lobe of thyroid gland
11. Isthmus of thyroid gland
12. Middle layer of superficial fascia
13. Sternal origin of sternocleidomastoid muscle
14. Internal jugular vein
15. Internal carotid artery
16. Descending branch hypoglossal nerve
17. Superior thyroid artery
18. Omohyoid muscle (cut off)
19. Sternohyoid muscle (cut off)
20. Thyrohyoid muscle
21. Ansa hypoglossi
22. Insertion of sternothyroid muscle (cut across)
23. Superficial cervical artery
24. Anterior scalene muscle
25. Fascicle of sternothyroid muscle attaching to carotid sheath
26. Jugular trunk
27. Sternothyroid muscle (cut across near origin)
28. Sternohyoid muscle (cut across)
29. Clavicle