nasal polyp

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na·sal pol·yp

an inflammatory or allergic polyp, arising from the ostium or cavity of one of the paranasal sinuses, which projects into the nasal cavity.

nasal polyp

a rounded, elongated piece of pulpy, dependent mucosa that projects into the nasal cavity.
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Nasal polyp

nasal polyp

ENT Any of the small, sac-like growths consisting of inflamed nasal mucosa, which can arise in clusters or individually, near the ethmoid sinuses, expanding into the open areas of the nasal cavity, possibly obstructing the airway and blocking drainage from the sinuses; sinusitis may arise in fluid accumulating in blocked sinuses Clinical Obstruction, mandatory mouth breathing due to chronic nasal obstruction, runny nose Etiology Asthma, allergic rhinitis/hay fever, vasomotor rhinitis, certain drugs, chronic sinusitis, cystic fibrosis

na·sal po·lyp

(nāzăl polip)
Inflammatory or allergic polyp, arising from the ostium or cavity of one of the paranasal sinuses, which projects into the nasal cavity.
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nasal polyp

A pedunculated polyp of the nasal mucosa. See: illustration

Nasal polyps are the most commonly identified nonmalignant tumor of the nasal passages. They are more commonly identified in men than in women.


The most common symptom of nasal polyposis is obstruction to the flow of air into and out of the nasal passages.


Steroid nasal sprays may improve airflow through the nasal passages. Surgical removal of polyps may occasionally be necessary when medical treatment is unsuccessful.

See also: polyp


pertaining to the nose.

nasal acariasis
characterized by mild nasal discharge and hyperemia, occasionally severe rhinitis. See also pneumonyssuscaninum.
nasal actinobacillosis
a chronic granulomatous lesion in the nasal cavity of the sheep, causing nasal obstruction and discharge, usually unilaterally.
nasal amyloidosis
in horses analogous to AL-amyloidosis in humans; can occur independently of a generalized disease, affecting nasal vestibule and anterior septum and turbinates, with sufficient nodular or diffuse deposits to obstruct the nasal passage.
nasal areae, nasal plane
the polygonal, raised, epidermal markings on the skin of the nasolabial plane of the dog. The pattern of marking is individual to each dog and can be used for identification, similar to the use of fingerprints in humans.
nasal bot fly
infestation causes sneezing and constant nasal discharge. The presence of the flies in the flock causes some insect worry. See also oestrusovis.
nasal breath
flow of the breath from the nostrils as distinct from the breath from the mouth.
nasal breath volume
as determined by holding the palms of the hands in front of the nostrils; diminution or cessation of flow are readily appreciated.
nasal catarrh
chronic nasal discharge without obvious physical cause. A specific problem of unknown etiology in rabbits, although Bordetella bronchiseptica is thought to be implicated. Manifested by sneezing, constant nasal and ocular discharge and matting of the fur on the insides of the forelimbs. Called also snuffles.
nasal cavity erectile tissue
erectile tissue present only in some patients; usually collapsed.
nasal cavity hemorrhage
nasal cavity obstruction
by mucosal inflammation, foreign body, neoplasm; detected by assessing the nasal breath flow.
nasal cavity olfactory region
located on ethmoturbinates, turbinates and nasal septum; covered by olfactory epithelium including sustentacular, basal and olfactory cells.
nasal cavity respiratory region
covers most of the cavities; covered by respiratory epithelium containing many, mainly serous, glands and carrying cilia.
nasal cavity-sinuses
see paranasal sinuses.
nasal cavity vestibular region
place of transition from skin to respiratory epithelium.
nasal conchae
see Table 10.
nasal cycling
reciprocal change in degree of congestion between nostrils; when the mucosa of one nasal cavity becomes congested the mucosal congestion of the opposite nasal cavity diminishes.
nasal deviation
1. occurs as a congenital deviation of the maxilla and nasal septum and leads to malocclusion of the maxillary teeth.
2. in older animals can result from paranasal sinus cysts or sinonasal neoplasia.
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Nasal deviation in a horse. By permission from Knottenbelt DC, Pascoe RR, Diseases and Disorders of the Horse, Saunders, 2003
nasal discharge
may be unilateral or bilateral, serous, purulent, hemorrhagic, or contain food material.
nasal diverticulum
see nasal diverticulum.
encapsulated nasal hematoma
persistent because of its size; blood is accumulated under respiratory mucosa so as to resemble a polyp. Like a polyp the hematoma obstructs the flow of breath through the nasal cavity.
enzootic nasal adenocarcinoma
of sheep and cattle may occur at a sufficiently high incidence to suggest an infectious cause. Usually unilateral in front of the ethmoid bone.
nasal fold
see facial fold1.
nasal foreign bodies
take the form of grass seeds or sticks poked up while the animal is scratching its muzzle in allergic rhinitis, especially in cattle. Cause sneezing, nasal discharge, inspiratory dyspnea, snoring noise and rubbing of the nose. Foreign bodies may be viewable or palpable.
nasal fossa
see nasal fossa.
nasal fundus
the caudal part of the nasal cavity, close to the ethmoid bone.
nasal granuloma
see enzootic nasal granuloma, mycotic nasal granuloma, schistosomanasalis.
nasal hematoma
cause unilateral nasal obstruction; are usually the result of foreign body injury, rarely due to inept passage of a nasal tube or endoscope.
nasal hemorrhage
see epistaxis. Called also rhinorrhagia, nose bleed.
nasal meatus
see nasal cavity.
nasal mites
see nasal acariasis (above).
nasal mucosal inflammation
nasal obstruction
causes respiratory stertor, mouth breathing, and small airstreams from the nostrils. It may be caused by a palpable foreign body.
nasal odor
smell of the nasal breath; may be necrotic, smell of ketones.
nasal passage
see nasal cavity.
nasal plane
see nasal plane.
nasal polyp
see nasal polyp.
progressive nasal hematoma
see progressive nasal hematoma.
nasal schistosomiasis
infection with the blood fluke schistosoma, which is largely asymptomatic but can cause dyspnea, snoring and profuse nasal discharge.
nasal septum
a vertical plate of bone and cartilage covered with mucous membrane that divides the cavity of the nose. See also septum.
nasal sinus
see paranasal sinus.
nasal swab
cotton swab on a stick, passed up the nostril to obtain a sample of exudate and epithelial debris for microbiological or cellular examination.
nasal tube
see nasogastric tube.
nasal turbinates
see nasal conchae (above) and Table 10.
nasal vestibule
the part of the nasal cavity just inside the nostrils that is lined with skin.
nasal wash
flushing of the nasal cavity, usually with sterile saline, to recover cells or infectious agents for cytology or culture.


1. any growth or mass protruding from a mucous membrane. Polyps may be attached to a membrane by a thin stalk, in which case they are known as pedunculated polyps, or may have a broad base (sessile polyps). They are usually an overgrowth of normal tissue, but sometimes polyps are true tumors or masses of new tissue separate from the supporting membrane. Usually benign, they may lead to complications or eventually become malignant.
Polyps may occur wherever there is mucous membrane: in the nose, ears, mouth, lungs, heart, stomach, intestines, urinary bladder, uterus and cervix. Terminology includes location and/or contents, e.g. adenomatous, fibrous, gastric, tracheal.
2. a sedentary form of hydrozoan, e.g. sea anemone.

nasal polyp
causes nasal obstruction in sporadic cases. Mycotic nasal granuloma of cattle is manifested by respiratory obstruction and polyps in the anterior part of the nasal cavity. They are eosinophilic granulomas containing spores and hyphae of the fungus Drechslera rostrata. In cats, inflammatory polyps arise from mucosa of the nasal cavity or auditory canal.
nasopharyngeal polyp
occur in cats of any age; inflammatory in origin, they may cause dyspnea, sometimes sneezing.
pharyngeal polyp
cause difficult swallowing and breathing. In cattle they are pedunculated and capable of much movement and erratic clinical signs.
References in periodicals archive ?
Different studies have assessed improvement in quality of life score after medical and or surgical treatment of patients with nasal polyps, yet the evidence on frequency of successful resolution of polypi with medical versus surgical treatment was limited and contained conflicting results which necessitated the present study with a hope that the results of the present study could help in selecting better treatment option for patients in future.
Signification of nasal polyps in chronic rhinosinusitis: symptoms and surgical outcome.
Chronic rhinosinusitis with nasal polyps (NP) is a disease of the paranasal sinuses and the nasal cavity and is distinguished by extracellular edema and abundant inflammatory cells.
90) An additional study using automated surface enhanced laser desorption/ ionization time-of-flight mass spectrometry on serum samples, a technology that identifies relative concentrations of low-molecular-weight proteins, the proteomic profile of patients with AFRS in comparison with those with aspirin sensitivity syndrome and CRS with nasal polyps has shown that the proteomic profile among the groups is different and that analysis can distinguish among the 3 groups with high sensitivity and specificity.
Increased ion transport in cultured nasal polyp epithelial cells.
We thank Josh Fierer and Jesus Gonzales for providing human Rhinosporidium tissue blocks, Mike Levy for the canine nasal polyp used for consensus PCR, Kristin Arkush for the Dermocystidium salmonis and Rosette agent DNA, and Robin Gutell for the mask used for phylogenetic analysis of the DRIPs clade.
The pathologic process of metaplastic ossification has been postulated to involve osteoblast progenitors, which may arise from (1) differentiation of pluripotential cells that are already present in the stroma of nasal polyp or (2) dedifferentiation of mesenchymal cells.
Correlation between cytokine levels in nasal fluid and eosinophil counts in nasal polyp tissue in asthmatic and non-asthmatic patients.
Paediatric pyogenic granuloma presenting as a unilateral nasal polyp.
The nasal polyp and sinusitis tissues were obtained from the ethmoid sinus in the 64 patients.
STUDY VARIABLES: Outcome & dependent- magnitude of infiltration of eosinophils in nasal polyp.
In traditional medicine it is used externally to treat warts, moles, fungal infections such as ringworm, varicose ulcers, some topical tumours, and the dried root is powdered and inhaled like snuff to treat nasal polyps.