Items tagged “paranasal sinuses”

14 results found
Article

Sinonasal disease

The nasal passage and paranasal sinuses (collectively sinonasal) plays host to a number of diseases and conditions, which can be collectively termed sinonasal disease. One way of classifying separate entities is as follows: inflammatory and infective conditions sinusitis acute sinusitis Pott...
Article

Acute invasive fungal sinusitis

Acute invasive fungal sinusitis is the most aggressive form of fungal sinusitis. It is seen particularly in immunocompromised patients and is the source of significant morbidity and mortality. It should be distinguished from the other two forms of invasive fungal sinusitis, chronic invasive fung...
Article

Fungal sinusitis

Fungal sinusitis is a collective term referring to a number of entities, which can be divided into two groups, depending on the presence of fungal hyphae within or beyond the mucosa 1: non-invasive: hyphae do not invade the mucosa allergic fungal sinusitis sinus fungal mycetoma invasive: hyp...
Article

Silent sinus syndrome

The silent sinus syndrome represents maxillary sinus atelectasis that results in painless enophthalmos, hypoglobus and facial asymmetry 1-3. Some authors restrict the term to patients with no history of sinusitis, trauma or surgery 2. Some authors suggest that is part of the spectrum of chronic ...
Article

Paranasal sinus osteoma

Paranasal sinus osteomas are common benign tumors, usually found incidentally. For a general discussion, please see the main osteoma article. Epidemiology Osteomas are commonly found in patients undergoing imaging of the sinuses, appearing in up to 3% of CT examinations of the paranasal sinus...
Article

Paranasal sinus mucocele

Paranasal sinus mucoceles represent complete opacification of one or more paranasal sinuses by mucus, often associated with bony expansion due to obstruction of the nasal sinus drainage. Clinical presentation Clinical presentation depends on two factors: location and direction of expansion p...
Article

Inverted papilloma

Inverted papillomas are a type of Schneiderian papilloma, representing an uncommon non-cancerous sinonasal tumor that mostly affects middle-aged men. They occasionally undergo malignant transformation. On imaging, they classically demonstrate a convoluted cerebriform pattern seen on both T2 and ...
Article

Convoluted cerebriform pattern

A convoluted cerebriform pattern is a term used to denote the appearance of a sinonasal inverted papilloma on MRI. The appearance is seen on both T2 and post contrast T1 images and appears as alternating roughly parallel lines of high and low signal intensity. This sign has been reported as pre...
Article

Sinonasal polyposis

Sinonasal polyposis refers to the presence of multiple benign polyps in the nasal cavity and paranasal sinuses. Epidemiology Sinonasal polyposis is most commonly encountered in adults and rare in children. Polyps are the most common expansile lesions of the nasal cavity 8. Associations Condi...
Article

Sphenoethmoidal recess

The sphenoethmoidal recess drains the posterior ethmoid air cells and sphenoid sinuses into the superior meatus of the nasal cavity.  Related pathology patterns of sinonasal obstruction
Article

Schneiderian epithelium

Schneiderian epithelium/membrane is the unique lining of the nasal cavity and paranasal sinuses, and is an ectodermally derived ciliated columnar epithelium with goblet cells. It differs from the similarly appearing respiratory epithelium, which is endodermally derived.  History and etymology ...
Article

Anterior ethmoidal notch

The anterior ethmoidal notch contains the anterior ethmoidal artery and has significant rates of anatomic variation that is seen during functional endoscopic sinus surgery (FESS). Gross anatomy The anterior ethmoidal notch lies in the medial wall of the superomedial orbit, adjacent to the ante...
Article

Frontal mucocele

A frontal mucocele is a paranasal sinus mucocele in a frontal sinus and is the most common location of all the paranasal sinus mucoceles 1. Clinical presentation Mucocoeles in the frontal sinus may be asymptomatic with insidious onset or present with headaches 2 and facial pain. Forehead (supr...
Article

Frontoethmoidal mucocele

A frontoethmoidal mucocele is a paranasal sinus cyst-like lesion (mucocele) lined with respiratory mucosa. The frontal and frontoethmoidal regions are reportedly the most common locations for paranasal sinus mucocele formation 1. They are thought to arise from obstruction of normal sinus drainag...

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