Difference between revisions of "Nasal cavity and paranasal sinuses"

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==Nasal polyps==
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==Nasal or sinonasal polyps==
 
Look for signs of malignancy.
 
Look for signs of malignancy.
{{Further|Tumor evaluation}}
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{{Further|Evaluation of suspected malignancies}}
[[File:Histopathology of a nasal polyp.jpg|thumb|'''Benign nasal polyp''' (not otherwise specified), consisting of hyperplastic edematous connective tissue with some seromucous glands and cells representing inflammation (mostly neutrophils and eosinophils). In early stages, the surface of the nasal polyp is covered by normal respiratory epithelium, but later it undergoes metaplastic change to squamous type epithelium (because of the constant irritation and inflammation). The submucosa shows large intercellular spaces filled with serous fluid.<ref>{{Cite book|url=https://books.google.com/books?id=Zm3jBwAAQBAJ&pg=PA168|title=Ear, Nose and Throat Histopathology|last=Michaels|first=Leslie|date=2012-12-06|publisher=Springer Science & Business Media|isbn=9781447133322|language=en|page=168}}</ref>]]
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[[File:Histopathology of a nasal polyp.jpg|thumb|'''Benign nasal/sinonasal polyp''' (not otherwise specified), consisting of hyperplastic edematous connective tissue with some seromucous glands and inflammation (mostly neutrophils and eosinophils), surrounded by respiratory or squamous epithelium.<ref>{{Cite book|url=https://books.google.com/books?id=Zm3jBwAAQBAJ&pg=PA168|title=Ear, Nose and Throat Histopathology|last=Michaels|first=Leslie|date=2012-12-06|publisher=Springer Science & Business Media|isbn=9781447133322|language=en|page=168}}</ref> It can be termed '''inflammatory nasal/sinonasal polyp''' when inflammation is more pronounced.]]
  
 
Main differential diagnoses:
 
Main differential diagnoses:
 
<gallery mode=packed heights=200>
 
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File:Histopathology of inverted papilloma.jpg|'''Inverted papilloma''', wherein the surface epithelial cells grow downward into the underlying supportive tissue.
 
File:Histopathology of inverted papilloma.jpg|'''Inverted papilloma''', wherein the surface epithelial cells grow downward into the underlying supportive tissue.
File:Histopathology of nasal squamous papilloma.jpg|'''Squamous papilloma'''.
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File:Histopathology of nasal squamous papilloma.jpg|'''Squamous papilloma''', with acanthosis and hyperkerratosis.
 
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In case of '''inflammation''', confirm that it is mixed and that lymphocytes are not atypical (otherwise, consult hematopathology, particularly whether it could be T cell lymphoma, nasal type.
 
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Revision as of 19:23, 26 October 2022

Author: Mikael Häggström [note 1]

Nasal or sinonasal polyps

Look for signs of malignancy. Further information: Evaluation of suspected malignancies

Benign nasal/sinonasal polyp (not otherwise specified), consisting of hyperplastic edematous connective tissue with some seromucous glands and inflammation (mostly neutrophils and eosinophils), surrounded by respiratory or squamous epithelium.[1] It can be termed inflammatory nasal/sinonasal polyp when inflammation is more pronounced.

Main differential diagnoses:

In case of inflammation, confirm that it is mixed and that lymphocytes are not atypical (otherwise, consult hematopathology, particularly whether it could be T cell lymphoma, nasal type.

Notes

  1. For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Patholines:Authorship for details.

Main page

References

  1. Michaels, Leslie (2012-12-06) (in en). Ear, Nose and Throat Histopathology . Springer Science & Business Media. p. 168. ISBN 9781447133322. 

Image sources