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However, when the opening is obstructed due to inflammation, polyps, mucosal thickening, anatomical abnormalities, or other lesions, pressure equilibration is impossible. Squeeze is produced on descent when trapped air in the sinuses contracts and produces negative pressure.
Polyps arise from the lining of the sinuses. Nasal mucosa, particularly in the region of middle meatus becomes swollen due to collection of extracellular fluid. This extracellular fluid collection causes polyp formation and protrusion into the nasal cavity or sinuses. Polyps which are sessile in the beginning become pedunculated due to gravity ...
The swelling of the vocal folds cause ballooned-like appearance, known as a polyp. The polyps of Reinke's edema are usually benign, however, there may be a risk of cancer if the patient is a smoker. Additionally, if the edema becomes too severe, patients may experience difficulty breathing due to airway obstruction. [2] [12]
A polyp is an abnormal growth of tissue projecting from a mucous membrane. If it is attached to the surface by a narrow elongated stalk, it is said to be pedunculated; if it is attached without a stalk, it is said to be sessile. Polyps are commonly found in the colon, stomach, nose, ear, sinus(es), urinary bladder, and uterus.
Vocal fold cysts cause the properties of the vocal folds to change. [9] When a cyst is present on a vocal fold , the cover of the vocal fold becomes more stiff and increases in mass. [ 9 ] The increased mass and stiffness tends to result in hyperkinetic muscular movement during phonation . [ 9 ]
Depending on length of symptoms, multinucleated giant cells and calcifications may be seen. Other disorders may be concurrently present, especially since this is a post infectious/inflammatory disorder, and these include a cholesterol granuloma, "tunnel clusters" (glandular epithelial inclusions below the surface epithelium), and cholesteatoma .
The cause is unknown, [2] but it is thought to be caused by intracellular edema of the superficial epithelial cells coupled with retention of superficial parakeratin. Although leukoedema is thought to be a developmental condition, it may be more common and more pronounced in smokers, and becomes less noticeable when smoking is stopped.
[21] [7] Mild trauma, and constant irritation to the oral mucosa histologically manifests as acanthosis and hyperparakeratosis. This defensive thickening is a primary function of epithelium. Histopathologically, numerous papillary projections are usually covered by hyperplastic stratified squamous epithelium with or without chronic inflammation ...