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| ==Follicular bronchitis/bronchiolitis== | | ==Follicular bronchitis/bronchiolitis== |
| ===General===
| | {{Main|Follicular bronchitis/bronchiolitis}} |
| *Similar to [[lymphocytic interstitial pneumonia]] (LIP).
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| **Overlaps with LIP.<ref name=pmid16088689>{{cite journal |author=Nicholson AG |title=Lymphocytic interstitial pneumonia and other lymphoproliferative disorders in the lung |journal=Semin Respir Crit Care Med |volume=22 |issue=4 |pages=409–22 |year=2001 |month=August |pmid=16088689 |doi=10.1055/s-2001-17384 |url=}}</ref>
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| *Associated with the things seen in LIP;<ref>{{cite journal |author=Aerni MR, Vassallo R, Myers JL, Lindell RM, Ryu JH |title=Follicular bronchiolitis in surgical lung biopsies: clinical implications in 12 patients |journal=Respir Med |volume=102 |issue=2 |pages=307–12 |year=2008 |month=February |pmid=17997299 |doi=10.1016/j.rmed.2007.07.032 |url=}}</ref> however, associations may be less clear in children.<ref name=pmid8404188>{{cite journal |author=Kinane BT, Mansell AL, Zwerdling RG, Lapey A, Shannon DC |title=Follicular bronchitis in the pediatric population |journal=Chest |volume=104 |issue=4 |pages=1183–6 |year=1993 |month=October |pmid=8404188 |doi= |url=}}</ref>
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| ===Gross/radiology===
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| *No distinct nodule or mass.
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| *Classically: increased reticular marking, i.e. interstitial pattern.
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| Images: [http://pathhsw5m54.ucsf.edu/case31/image317.html Intersitial pattern - radiographs (ucsf.edu)].
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| ===Microscopic===
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| Features:<ref name=afip_vol2_277>AFIP atlas of nontumour pathology. 2002. Vo. 2. P.277. ISBN 1-881041-79-4.</ref>
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| *Peribronchiolar/peribronchial lymphoid nodules with:
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| **Reactive germinal centres.
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| ***Lack of these should raise suspicion for lymphoma.
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| **[[Plasma cells]].
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| *+/-Lymphoid nodules in the interlobular septa.
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| Notes:
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| *Lung parenchyma distant from nodule = normal; no lymphocytic infiltrate.
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| DDx:
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| *[[Lymphoma]], specifically [[MALToma|MALTomas/BALTomas]].
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| *[[Lymphocytic interstitial pneumonia]].
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| *Nodular lymphoid hyperplasia.
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| **This is determined in part by radiology; it has nodules radiographically.
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| ==Pulmonary nodular lymphoid hyperplasia== | | ==Pulmonary nodular lymphoid hyperplasia== |