Pharynx and Larynx


Figure 401 Line drawing of photograph representing radiographic positioning for Figure 400.

Figure 402 Lateral projection of pharynx and larynx.

A Mandibles

1 Angular processes

B Temporomandibular joints

C Tympanic bullae

D Occipital condyle

E Atlas

F Axis

G 3rd cervical vertebra

H Stylohyoid bones

I Epihyoid bones

J Ceratohyoid bones

K Basihyoid bone

L Thyrohyoid bones

2 Soft palate

3 Epiglottis

4 Arytenoid cartilage

4(a) Cuneiform process

4(b) Corniculate process

5 Thyroid cartilage. (Some mineralisation of cartilage is present at ventral aspect, 5(a).)

6 Cricoid cartilage. (Some mineralisation of cartilage is seen especially at dorsal aspect, 6(a).)

Mineralisation of laryngeal cartilages is a normal ageing process in the dog but can be present as early as 6–12 months of age. The mineralisation pattern and opacity vary between the different cartilages and individual dogs. As in this dog, thyroid and cricoid cartilages are the most commonly affected and opacity will increase with age.

7 Tracheal cartilages

8 Tracheal lumen

9 Lateral ventricle of larynx

10 Nasopharynx

11 Oropharynx

12 Laryngopharynx

13 Laryngeal vestibule

14 Laryngeal glottis

15 Infraglottic cavity

16 Thyro- and cricopharyngeal muscles obliterating the lumen of laryngopharynx dorsal to the arytenoid and cricoid cartilage regions

17 Oesophageal lumen

Figure 403 Drawing of lateral projection of pharynx and larynx to provide guidance on normal sizes of retropharyngeal space and trachea.

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Jun 23, 2017 | Posted by in ANIMAL RADIOLOGY | Comments Off on Pharynx and Larynx

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