ent cases
![Accessory Maxillary Sinus Ostium [CT scan]](https://medtube.net/images/min/68a3c676d8dbb112cff8f250e98e1741/149/112/1 "Accessory Maxillary Sinus Ostium [CT scan]")
Accessory Maxillary Sinus Ostium [CT scan]
The direct connection between the left maxillary sinus and the left middle meatus seen on this coronal CT scan is an accessory maxillary sinus ostium through the posterior fontanelle.
![Accessory Maxillary Sinus Ostium [large]](https://medtube.net/images/min/bdf143c599d427f707c63a5490b893f8/149/112/1 "Accessory Maxillary Sinus Ostium [large]")
Accessory Maxillary Sinus Ostium [large]
A large accessory maxillary sinus ostium is present through the posterior fontanelle of this left side. Note the prominent nasal septal spur protruding into the middle meatus and abutting against the...
![Normal Frontal Recess [left]](https://medtube.net/images/min/8fc490972e2cad383624c5591ad1db06/149/112/1 "Normal Frontal Recess [left]")
Normal Frontal Recess [left]
This is a view into a normal left frontal recess taken with a 30° telescope. To the right the lateral face of the middle turbinate is visible. The uncinate process is seen fading superiorly. Between44...
The Superior Meatus and Sphenoethmoidal Recess
The superior meatus lies lateral to the superior turbinate. This is a view into the superior meatus underneath a well developed right superior terminate. The ostia of the ethmoidal clefts and cell openings...
The Nasa Fontanelles
There are usually defects in the bony lateral wall of the nose located between the uncinate process and the inferior turbinate that in life are covered with a dense connective tissue that is a continuation...
![Eustachian Tube Orifice [swallowing]](https://medtube.net/images/min/6afec91a83880ff7181dc95692b51c95/149/112/1 "Eustachian Tube Orifice [swallowing]")
Eustachian Tube Orifice [swallowing]
The opening and closing of the eustachian tube orifice can be observed as the patient swallows or performs a Valsalva manoeuvre.
![Eustachian Tube Orifice [left]](https://medtube.net/images/min/8284d8d74eb5b7731770e2331b6a3e6f/149/112/1 "Eustachian Tube Orifice [left]")
Eustachian Tube Orifice [left]
The torus tubarius [eustachian tube orifice] is formed by the medial end of the eustachian tube which projects into the lateral wall of the nasopharynx and consequently not be seen by means of conventional...
Postoperative Frontal Sinus Recess
A close-up view into the frontal recess area following endoscopic sinus surgery. The unobstructive passage into the frontal sinus can be clearly seen in the 12 o'clock position.
![The Sphenoethmoidal Recess [right]](https://medtube.net/images/min/630ecefaf7f9d9f90d9a88f50c4c91db/149/112/1 "The Sphenoethmoidal Recess [right]")
The Sphenoethmoidal Recess [right]
A right sphenoethmoidal recess. Note the superior and supreme turbinates as well as the sphenoid sinus ostium. There is some thickened, nonpurulent secretions issuing from the posterior ethmoid and sphenoid...
![The Sphenoid Sinus Ostium [right]](https://medtube.net/images/min/6d4931745b5d275949b32ca77a61a23e/149/112/1 "The Sphenoid Sinus Ostium [right]")
The Sphenoid Sinus Ostium [right]
The sphenoid sinus ostium is located in the posteriorosuperior portion of the nasal cavity just lateral to the insertion of the posteriorosuperior portion of the nasal septum into the anterior wall of...
![The Superior Turbinates and the Superior Meatus [right]](https://medtube.net/images/min/b4a2525eb20acff055ef52ef0d8e61e7/149/112/1 "The Superior Turbinates and the Superior Meatus [right]")
The Superior Turbinates and the Superior Meatus...
Endoscopically, the superior turbinate appears to rise from the middle terminate or to be a subdivision of it. From a developmental point of view, however, these are two very different structures connected...
![Normal Uncinate Process [right]](https://medtube.net/images/min/48411754ee304e0ba21f07335308b1ca/149/112/1 "Normal Uncinate Process [right]")
Normal Uncinate Process [right]
The curved structure that arises from the lacrimal ridge and extends posteromedially like a visor over the anterior aspect of the ethmoidal bulla is the uncinate process. The ethmoidal bulla can be seen...
![The Ethmoidal Bulla [Right]](https://medtube.net/images/min/a250250686b6dbef13c046febf235d77/149/112/1 "The Ethmoidal Bulla [Right]")
The Ethmoidal Bulla [Right]
The anterior ethmoidal bulla arises from the lamina papyracea just behind the uncinate process. The space between the posterior free margin of the uncinate process and the anterior surface of the ethmoidal...
Normal Right Middle Turbinate
The area lateral to the middle turbinate is called the middle meatus. Note the insertion of the middle turbinate [the neck of the middle turbinate] into the lateral nasal wall. A normal middle turbinate...
The Nasolacrimal Duct
The lacrimal sac empties into the nasal cavity underneath the anterior end of the inferior turbinates. The opening of the nasolacrimal duct and Hasner's Valve can be clearly seen beneath the anterior...
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