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| ==Respiratory bronchiolitis interstitial lung disease== | | ==Respiratory bronchiolitis interstitial lung disease== |
| *Abbreviated ''RBILD''.
| | {{Main|Respiratory bronchiolitis interstitial lung disease}} |
| ===General===
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| *May be an early version of ''[[DIP]]''.
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| ===Microscopic===
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| Features:<ref name=Ref_PPP197-8>{{Ref PPP|197-8}}</ref>
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| *Brown pigmented airspace macrophages - ''smoker's macrophages''.
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| *Inflammation of the terminal bronchioles.
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| Note:
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| *The histologic features of RBILD may be present peri-tumoural.
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| ==Desquamative interstitial pneumonia== | | ==Desquamative interstitial pneumonia== |
| *Abbreviated ''DIP''.
| | {{Main|Desquamative interstitial pneumonia}} |
| ===General===
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| *Thought to be advanced [[RBILD]].
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| ===Microscopic===
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| Features:
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| *Brown pigmented airspace macrophages - ''smoker's macrophages''.
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| *Architecture preserved; "linear fibrosis".
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| Notes:
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| *Some fields of view may be indistinguishable from RBILD.
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| *Amiodarone toxicity, fibrotic NSIP - may appear similar.
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| ==Pulmonary Langerhans cell histiocytosis== | | ==Pulmonary Langerhans cell histiocytosis== |