Sinonasal polyposis
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Sinonasal polyposis refers to the presence of multiple benign polyps in the nasal cavity and paransalparanasal sinuses. It causes a specificparticular pattern of chronic sinusitis.
Clinical presentation
Clinical symptoms may include 3
- progressive nasal stuffiness
- rhinorrhea
- facial pain
- headache
- anosmia
Radiographic features
CT
- extensive mucosal polyps occupying and obliterating the nasal cavity and the paranasal sinuses
- usually, they are hypodense, but may be hyperdense due increased protein content or fungal infection
- associated local benign bone remodelling or erosion (as opposed to a mucocoele where the entire sinus is expanded 6)
- enlargement of infundibula
- attenuation of the ethmoid sinus walls and nasal septum
- occasionally sparing of the inferior nasal meatus
- truncation of middle turbinate 4
- opacified ethmoid sinuses with convex lateral walls and air-fluid levels
-
a concurrent fungal sinus infection may be
commonpresent
Differential diagnosis
-
sinonasal retention cyst
- can be indistinguishable
- usually spares the nasal cavity
-
allergic fungal sinusitis
- commonly associated with polyps
- hyperdense central areas
- MRI may show low T1 and T2 signal
-
Wegener granulomatosis
- centred in the nasal cavity
-<p><strong>Sinonasal polyposis </strong>refers to the presence of multiple benign polyps in the nasal cavity and paransal sinuses. It causes a specific <a href="/articles/patterns-of-sinonasal-obstruction">pattern</a> of <a href="/articles/chronic-sinusitis">chronic sinusitis</a>.</p><h4>Clinical presentation</h4><p>Clinical symptoms may include <sup>3</sup></p><ul>- +<p><strong>Sinonasal polyposis </strong>refers to the presence of multiple benign polyps in the nasal cavity and paranasal sinuses. It causes a particular <a href="/articles/patterns-of-sinonasal-obstruction">pattern</a> of <a href="/articles/chronic-sinusitis">chronic sinusitis</a>.</p><h4>Clinical presentation</h4><p>Clinical symptoms may include <sup>3</sup></p><ul>
-<li>extensive mucosal polyps occupying and obliterating the nasal cavity and the paranasal sinuses</li>- +<li>extensive mucosal polyps occupying and obliterating the nasal cavity and the paranasal sinuses<ul><li>usually, they are hypodense, but may be hyperdense due increased protein content or fungal infection</li></ul>
- +</li>
-<li>concurrent <a href="/articles/fungal-sinusitis">fungal sinus infection</a> may be common</li>-</ul>- +<li>a concurrent <a href="/articles/fungal-sinusitis">fungal sinus infection</a> may be present</li>
- +</ul><h4>Differential diagnosis</h4><ul>
- +<li>
- +<a href="/articles/paranasal-sinuses-retention-cysts">sinonasal retention cyst</a><ul>
- +<li>can be indistinguishable </li>
- +<li>usually spares the nasal cavity</li>
- +</ul>
- +</li>
- +<li>
- +<a href="/articles/allergic-fungal-sinusitis">allergic fungal sinusitis</a><ul>
- +<li>commonly associated with polyps </li>
- +<li>hyperdense central areas </li>
- +<li>MRI may show low T1 and T2 signal</li>
- +</ul>
- +</li>
- +<li>
- +<a href="/articles/granulomatosis-with-polyangiitis-upper-respiratory-tract-manifestations-1">Wegener granulomatosis</a><ul><li>centred in the nasal cavity</li></ul>
- +</li>
- +</ul><p> </p>
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