File:Hypersensitivity pneumonitis intermed mag.jpg

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English: Intermediate magnification micrograph of hypersensitivity pneumonitis, also known as extrinsic allergic alveolitis (EAA). Lung biopsy. Trichrome stain.

EAA, as seen in the micrograph, is characterized by:

  • Chronic interstitial inflammation consisting primarily of lymphocytes and includes granulomata.
  • Interstitial fibrosis.
  • Air space involvement (alveolitis).

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Source Own work
Author Nephron

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current04:54, 28 August 2009Thumbnail for version as of 04:54, 28 August 20092,602 × 3,618 (2.74 MB)Nephron (talk | contribs){{Information |Description={{en|1=Intermediate magnification micrograph of '''hypersensitivity pneumonitis''', also known as '''extrinsic allergic alveolitis''' (EAA). [[w:Trichrome stain|Trichrome stai

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