squamous cell papilloma


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  • Clinical

    • endobronchial
    • HPV association

  • Histology

    • exophytic (common) or inverted
    • squamous epithelium
    • orderly maturation
    • fibrovascular cores
    • may have scattered atypia

  • Ddx

    • inflammatory endobronchial polyp
      • granulation tissue
      • inflammation
      • only focal squamous metaplasia
    • SCC
      • malignant cytology
      • stromal invasion, LVSI
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