T h y r o i d g l a n d
Anatomical structure of the thyroid gland and larynx.
Thyroid gland has two lobes connected by the isthmus.
Larynx has a female type of structure.
Thyroid cartilage angle is 115 degrees.
Position is changed.
Upper poles mount to the lower third of the lower horns of the thyroid cartilage.
Lower poles mount to the 3rd-4th tracheal cartilages.
Upper border of the isthmus mounts to the cricothyroid ligament.
Shape.
Anterior surface of the thyroid is concave.
Lateral border is S-shaped.
Posterior surface is straight.
Medial border repeats the shape of the trachea and esophagus.
S i z e i s i n c r e a s e d.
Height of the thyroid lobe - 34 mm. Width - 37 mm.
Depth - 11 mm. Depth of the isthmus - 2 mm.
Volume of the thyroid gland (according to the tomographic findings) - 2,9 cm3.
Echostructure is microgranular, homogenous.
Integrated optical density — 0.3753±0.1293 ![]() |
Fig.48.2. Autoimmune thyroiditis and atrophy of the thyroid gland. Reconstructed two-dimensional images of the thyroid gland. A - Right lateral view - projection on the sagittal plane. B - Anterior view - projection on the frontal plane. Scale 1:1. Horizontal lines in fig.48.2.B show the levels of transverse section. Numbers in rectangular frame indi-cate the sections included in fig.48.1. Signs. 1 - musculus constrictor pharyngis inferior, 2 - cartilago thyroidea, 3 - cartilago cricoidea, 4 - glandula thyroidea, lobus dexter, 5 - oesophagus, 6 - vertebra, 7 - trachea, 8 - sagittal line.