sinonasal polyp


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  • Clinical

    • rhinosinusitis
    • associated with asthma, aspirin intolerance, cystic fibrosis

  • Types

    • antrochoanal polyp
      • antral (maxillary) polyp prolapse through sinus ostia, presenting as nasal cavity mass
    • angiomatous polyp
      • vascular, traumatized
    • infarcted polyp

  • Histology

    • polypoid mucosa
    • stroma
      • edematous
      • chronic inflammation
      • submucosal glands
      • may have atypical myofibroblastic cells

  • Ddx

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