High-Resolution Computed Tomography of the Paranasal Sinuses by Gertrude Maatman MD, PhD (auth.)

By Gertrude Maatman MD, PhD (auth.)

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Additional resources for High-Resolution Computed Tomography of the Paranasal Sinuses and Pharynx and Related Regions: Impact of CT identification on diagnosis and patient management

Example text

The auditory tube orifice is visible anterior to the torus tubarius. It also presents as a small slitlike air-density cavity. Mancuso (5) and Silver (12) described the normal nasopharynx and variants of normal. They concluded that the superficial landmarks (tori, Eustachian tube orifices and lateral pharyngeal recesses) of the nasopharynx are often asymmetrical, whilst the deep tissue planes are symmetrical. In the case of asymmetrical superficial landmarks, they conclude that it is useful to res can with a widely opened mouth, or during a "pinched nose" modified Valsalva maneuver.

Internal carotid a. internal jugular v. sternocleidomastoid m. scalenu mediu m. longissimus capitis m. minor occipital n. deep cervical v. semispinalis cervicis m. trapezius m. 14. Axial section at the level of tongue and floor of the mouth. Note the presence of anterior belly of digastric muscle on the left. Posterolateral to the mylohyoid muscle, the submandibular glands present as round structures with the density of muscle since they contain less fat than the parotid gland (figs. 15). The pharyngeal musculature and the palatine tonsils form a homogeneous mass in which the various structures cannot be identified.

The upper lymph nodes lie just lateral to the internal jugular vein. The afferent lymphatics of the internal jugular nodes come both from the regional nodes and directly from organs or regions. The nodes connected to and draining into this chain are the spinal accessory and transverse cervical nodes, the entire anterior cervical group, as well as the submandibular, submental, parotid, postauricular, occipital, sublingual and retropharyngeal nodes. The direct afferent vessels draining into this chain may come from the entire nasal cavity, pharynx, tonsils, external and middle ear, Eustachian tube, tongue, hard and soft palate, hypopharynx and larynx.

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