China
Africa
Explore chapters and articles related to this topic
Anatomy of the head and neck
Published in Helen Whitwell, Christopher Milroy, Daniel du Plessis, Forensic Neuropathology, 2021
The narrow, curved roof of the nasal cavity is divided into frontonasal, ethmoidal and sphenoidal parts, named by adjacent bones. The wide floor is formed by the horizontal plate of the palatine bone and the palatine process of the maxilla. Medially, the wall is the nasal septum, comprising the vomer, perpendicular plate of the ethmoid, septal cartilage and the nasal crests of the maxillary and palatine bones. The lateral walls of the nasal cavity are made up of three nasal conchae or scroll bones, each forming a roof over a meatus connecting the nasal cavity to a sinus or the orbit. The superior meatus is between the superior and middle conchae, into which orifices from the posterior ethmoidal sinuses open. The middle meatus, inferior to the middle conchae, communicates with the frontal sinus via the frontonasal duct and the maxillary sinus at its posterior end. The inferior meatus is inferolateral to the inferior conchae and receives the nasolacrimal duct from the lacrimal sac into its anterior portion.
Ear, Nose, and Paranasal Sinus
Published in Swati Goyal, Neuroradiology, 2020
The paranasal sinuses are air-filled spaces between the bones around the nasal cavity. Draining ostia connect four distinct sinuses with the nasal cavity. The anterior ethmoid cells, the frontal sinus, and maxillary sinus drain into the middle meatus. The posterior ethmoid cells and sphenoid sinus drain into the superior meatus. The nasolacrimal duct drains into the inferior nasal meatus.
Sinonasal tumours
Published in Neeraj Sethi, R. James A. England, Neil de Zoysa, Head, Neck and Thyroid Surgery, 2020
Yujay Ramakrishnan, Shahzada Ahmed
The most interesting of these is inverted papilloma due to its propensity for local tissue destruction, high recurrence and malignant transformation. It is the second most common benign nasal tumour (after osteoma) with an incidence of 0.5–1.6 cases/100,000 per year [20]. It commonly arises from the lateral nasal wall in the region of the middle meatus. This tumour is characterised by endophytic growth into the underlying stroma (intact basement membrane) with adjacent tissue destruction. Despite having the word ‘papilloma’ in its name, there is not definitive evidence this is caused by human papillomavirus.
Orbital Complications of Chronic Rhinosinusitis: Two Years’ Experience in a Tertiary Referral Hospital
Published in Ocular Immunology and Inflammation, 2023
Dina Tadros, Mohamed O Tomoum, Heba M. Shafik
We included patients with orbital manifestations of complicated rhinosinusitis (e.g., proptosis, limitation of ocular motility, periorbital swelling and pain, and visual acuity affection). All patients were diagnosed with rhinosinusitis according to the European Position Paper on Rhinosinusitis and Nasal Polyps (EPOS) 2020 criteria7 which stated that diagnosis of rhinosinusitis requires two or more symptoms, one of which should be either nasal blockage or nasal discharge: ± facial, pain/pressure ± reduction or loss of smell. In addition to endoscopic signs of nasal polyps, mucopurulent discharge, and mucosal obstruction of the middle meatus. The diagnosis of RS was confirmed by computed tomographic scan of the nose and paranasal sinuses. We excluded patients with orbital inflammation that did not fulfill the EPOS diagnostic criteria of RS.
Current management strategies of congenital nasolacrimal duct obstructions
Published in Expert Review of Ophthalmology, 2021
Silvana Artioli Schellini, Victoria Marques-Fernandez, Roberta Lilian Fernandes Sousa Meneghim, Alicia Galindo-Ferreiro
This technique is also similar to the technique used in adults, except the instruments are more delicate due to the reduced dimensions of the nasal fossa. The middle meatus is reached using a 2.7 mm 0° rigid nasal endoscope. After infiltration of local anesthetic associated with a vasoconstrictor, the lateral nasal mucosa is opened using a sickle knife or a blade, starting from the front of the uncinate process near the maxillary line and moving downward, reaching the periosteum. The frontal process of the maxilla is removed, and then the medial lacrimal sac wall is exposed and opened. The lacrimal sac can be marsupialized or the medial portion of the lacrimal sac can be removed. A stent can be inserted, but it does not improve the success rate (Figure 4A-D).
The Endoscopic Transnasal Approach to Orbital Tumors: A Review
Published in Seminars in Ophthalmology, 2021
Edith R. Reshef, Benjamin S. Bleier, Suzanne K. Freitag
The orbital surgeon should be familiar with the pertinent anatomy of the sinonasal cavity. The superior aspect of the nasal cavity has been separated from the orbit by the adjacent anterior and posterior ethmoid sinuses, which drain to the middle and superior meatus, respectively, and by the lamina papyracea, derived from the ethmoid bone to form a large portion of the medial wall of the orbit. The anterior and posterior ethmoids are divided by the basal lamella of the middle turbinate. The sphenoid sinuses lie posterior to the nasal cavity, communicating via the sphenoethmoidal recess. The basal lamella of the superior turbinate separates the sphenoid ostia from the posterior ethmoid sinuses. Inferior to the orbit and lateral to the nasal cavity lies the maxillary sinus, which drains to the middle meatus via the maxillary ostium (Figure 1).