Items tagged “paranasal sinuses”
11 results found
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...
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...
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 mucosa allergic fungal sinusitis sinus fungal mycetoma invasive: hyphae ...
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. Epidemiology Silent sinus syndrome usually presents in the ...
Paranasal sinus osteoma
Osteoma of the paranasal sinuses is a common benign tumor, usually found incidentally. Epidemiology Osteomas are commonly found in patients undergoing imaging of the sinuses, appearing in up to 3% of CT examinations of the paranasal sinuses 1. They are most frequently diagnosed in 20-50 years ...
Paranasal sinus mucocele
Paranasal sinus mucoceles (or mucocoeles) 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...
Inverted papillomas are a type of Schneiderian papilloma. They are uncommon with distinctive pathological and imaging features. Terminology The term inverted papilloma is also used to describe a urothelial lesion. For a discussion of that entity, please refer to inverted papilloma of the urin...
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...
Sinonasal polyposis refers to the presence of multiple benign polyps in the nasal cavity and paranasal sinuses. Epidemiology It is most commonly encountered in adults and rare in children. Polyps are the most common expansile lesions of the nasal cavity 8. Incidence increases in patients with ...
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
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 ...