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See subtypes below: angiectaticantrochoanalatypical stromal cellscystic fibrosisinflammatory

General
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Endoscopic images
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Gelatinous polyp

Large polyp extending into oropharynx

Micro description
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Angiectatic

General
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Gross description
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Gross images
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Marked hemorrhage and spongiform change (arrows)
Translucent, glistening appearance of typical inflammatory nasal polyp (asterisk)

Micro description
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Micro images
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Proliferation of thin walled vascular channels

Thin walled vessels embedded in amorphous material

Atypical stromal cells and fibrin thrombi

Vascular channels lined by large hyperchromatic endothelial cells

Electron microscopy images
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Poorly formed vascular channel with endothelial cells resting on granular
and amorphous material composed of red blood cells and intact and degenerated platelets

Differential diagnosis
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Additional references
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Antrochoanal

General
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Gross description
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Micro description
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Atypical stromal cells

General
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Cystic fibrosis

General
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Micro description
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Positive stains
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Inflammatory

General
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Gross description
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Micro description
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Micro images
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Respiratory mucosa with edematous stroma
with numerous eosinophils and plasma cells

Differential diagnosis
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End of Nasal cavity > Inflammatory / infectious lesion > Nasal polyps



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