Nasal polyps: Difference between revisions

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Memory devices:
Memory devices:
*''GAIT'' = '''G'''enetic, '''A'''llergic/idiopathic, '''I'''nfectious, '''T'''umours.
*''GAIT'' = '''G'''enetic, '''A'''llergic/idiopathic, '''I'''nfectious, '''T'''umours.
*Allergic causes '''A'''s - '''a'''llergic, '''a'''sthma, '''a'''llergic granulomatous angiitis (Churg-Strauss syndrome), non'''a'''llergic rhinitis with eosinophilia.
*Allergic causes '''A'''s - '''a'''llergic, '''a'''sthma, '''a'''llergic granulomatous angiitis ([[Eosinophilic granulomatosis with polyangiitis|Churg-Strauss syndrome]]), non'''a'''llergic rhinitis with eosinophilia.


===Epidemiology===
===Epidemiology===
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- Inflamed edematous sinonasal mucosa with abundant neutrophils and fragments of bone.
- Inflamed edematous sinonasal mucosa with abundant neutrophils and fragments of bone.
- Negative for malignancy.
- Negative for malignancy.
</pre>
====Alternate====
<pre>
A. Contents of Left Ethmoid Sinus, Excision:
    - Mildly inflamed sinonasal mucosa with bone and fibrous tissue.
    - NEGATIVE for malignancy.
B. Contents of Right Ethmoid Sinus, Excision:
    - Mildly inflamed sinonasal mucosa with bone and fibrous tissue.
    - NEGATIVE for malignancy.
</pre>
</pre>


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**[[Wegener's granulomatosis]].
**[[Wegener's granulomatosis]].
**[[Churg-Strauss syndrome]].
**[[Churg-Strauss syndrome]].
*[[Biphenotypic sinonasal sarcoma]] - has hypercellular stroma.


===Sign out===
===Sign out===
<pre>
A. Left Nasal Polyp, Excision:
- Inflamed edematous sinonasal mucosa with abundant eosinophils.
- NEGATIVE for malignancy.
B. Right Nasal Polyp, Excision:
- Inflamed edematous sinonasal mucosa with abundant eosinophils and fragments of bone.
- NEGATIVE for malignancy.
</pre>
<pre>
<pre>
A. Nasal sinus tissue, right, excision:
A. Nasal sinus tissue, right, excision:
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</pre>
</pre>


 
====Block letters====
<pre>
<pre>
A. NASAL SINUS TISSUE, RIGHT, EXCISION:
A. NASAL SINUS TISSUE, RIGHT, EXCISION:
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- NEGATIVE FOR MALIGNANCY.
- NEGATIVE FOR MALIGNANCY.
</pre>
</pre>
==Tonsillar lymphangiomatous polyp==
===Microscopic===
Features:<ref>http://www.nature.com/modpathol/journal/v13/n10/full/3880208a.html</ref>
*Polyp with lymph channels.


==Schneiderian papilloma==
==Schneiderian papilloma==
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*May mimic invasive SCC.
*May mimic invasive SCC.


Images:
=====Images=====
*[http://path.upmc.edu/cases/case32.html Inverted papilloma & verrucous carcinoma (upmc.edu)].
*[http://path.upmc.edu/cases/case32.html Inverted papilloma & verrucous carcinoma (upmc.edu)].
*[http://commons.wikimedia.org/wiki/File:Sinonasal_papilloma_-_very_low_mag.jpg Schneiderian papilloma - very low mag. (WC)].
<gallery>
*[http://commons.wikimedia.org/wiki/File:Sinonasal_papilloma_-_cropped_-_very_high_mag.jpg Schneiderian papilloma - very high mag. (WC)].
Image:Sinonasal_papilloma_-_very_low_mag.jpg | Schneiderian papilloma - very low mag. (WC)  
Image:Sinonasal_papilloma_-_cropped_-_very_high_mag.jpg | Schneiderian papilloma - very high mag. (WC)
</gallery>


====Fungiform Schneiderian papilloma====
====Fungiform Schneiderian papilloma====
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*Exophytic or endophytic growth pattern.
*Exophytic or endophytic growth pattern.


==Antrochoanal polyp==
*Abbreviated ''ACP''.
===General===
*Benign.<ref name=pmid15626248>{{cite journal |authors=Maldonado M, Martínez A, Alobid I, Mullol J |title=The antrochoanal polyp |journal=Rhinology |volume=42 |issue=4 |pages=178–82 |date=December 2004 |pmid=15626248 |doi= |url=}}</ref>
*Relative common ~5% of nasal polyps.<ref name=pmid19609378>{{cite journal |authors=Frosini P, Picarella G, De Campora E |title=Antrochoanal polyp: analysis of 200 cases |journal=Acta Otorhinolaryngol Ital |volume=29 |issue=1 |pages=21–6 |date=February 2009 |pmid=19609378 |pmc=2689564 |doi= |url=}}</ref>
Epidemiology:
*"Almost always" recur if incompletely excised.<ref name=pmid19609378/>
*Originates from maxillary sinus and extends to choana.<ref name=pmid23179936>{{cite journal |authors=Balikci HH, Ozkul MH, Uvacin O, Yasar H, Karakas M, Gurdal M |title=Antrochoanal polyposis: analysis of 34 cases |journal=Eur Arch Otorhinolaryngol |volume=270 |issue=5 |pages=1651–4 |date=May 2013 |pmid=23179936 |doi=10.1007/s00405-012-2274-2 |url=}}</ref>
===Microscopic===
Features:<ref>{{cite journal |authors=Min YG, Chung JW, Shin JS, Chi JG |title=Histologic structure of antrochoanal polyps |journal=Acta Otolaryngol |volume=115 |issue=4 |pages=543–7 |date=July 1995 |pmid=7572133 |doi=10.3109/00016489509139364 |url=}}</ref>
*Respiratory epithelium.
*Relatively pauciglandular - when compared to inflammatory nasal polyps.
*Typically few eosinophils.
DDx:
*Inflammatory nasal polyps.
===Sign out===
<pre>
Ethmoid Sinus Contents (Right), Excision:
    - Benign nasal polyp (antrochoanal type) and mildly inflamed sinonasal mucosa.
    - NEGATIVE for malignancy.
</pre>


==See also==
==See also==
*[[Head and neck pathology]].
*[[Head and neck pathology]].
*[[Tonsillar lymphangiomatous polyp]].


==References==
==References==
Retrieved from "https://librepathology.org/wiki/Nasal_polyps"