Medical lung diseases: Difference between revisions

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==Constrictive bronchiolitis==  
==Constrictive bronchiolitis==  
*[[AKA]] ''bronchiolitis obliterans'', [[AKA]] ''obliterative broncholitis'',<ref name=pmid16493150/> [[AKA]] bronchiolitis obliterans syndrome (BOS).<ref name=pmid18707652>{{Cite journal  | last1 = Sato | first1 = M. | last2 = Keshavjee | first2 = S. | title = Bronchiolitis obliterans syndrome: alloimmune-dependent and -independent injury with aberrant tissue remodeling. | journal = Semin Thorac Cardiovasc Surg | volume = 20 | issue = 2 | pages = 173-82 | month =  | year = 2008 | doi = 10.1053/j.semtcvs.2008.05.002 | PMID = 18707652 }}</ref>
*[[AKA]] ''bronchiolitis obliterans'', [[AKA]] ''obliterative broncholitis'',<ref name=pmid16493150/> [[AKA]] bronchiolitis obliterans syndrome (BOS).<ref name=pmid18707652>{{Cite journal  | last1 = Sato | first1 = M. | last2 = Keshavjee | first2 = S. | title = Bronchiolitis obliterans syndrome: alloimmune-dependent and -independent injury with aberrant tissue remodeling. | journal = Semin Thorac Cardiovasc Surg | volume = 20 | issue = 2 | pages = 173-82 | month =  | year = 2008 | doi = 10.1053/j.semtcvs.2008.05.002 | PMID = 18707652 }}</ref>
===General===
{{Main|Constrictive bronchiolitis}}
*'''''Not''''' the same as (idiopathic) ''[[bronchiolitis obliterans organizing pneumonia]] (BOOP)'' - in short:
**BOOP: clogs the airway, has Masson bodies, treated with steroids - good prognosis.
**Constrictive bronchiolitis: fibrosis around airways, crappy prognosis.
 
*No good treatment.
*Progressive.
 
Etiology/associations:<ref name=pmid16493150/>
*Post-infectious.
**Viral, e.g. [[Adenovirus]].
**Mycoplasma.
*Post-lung transplant.<ref name=pmid19896545/>
*Post-hematopoietic stem cell transplantation
**Associated with GVHD.<ref name=pmid19896545>{{Cite journal  | last1 = Chien | first1 = JW. | last2 = Duncan | first2 = S. | last3 = Williams | first3 = KM. | last4 = Pavletic | first4 = SZ. | title = Bronchiolitis obliterans syndrome after allogeneic hematopoietic stem cell transplantation-an increasingly recognized manifestation of chronic graft-versus-host disease. | journal = Biol Blood Marrow Transplant | volume = 16 | issue = 1 Suppl | pages = S106-14 | month = Jan | year = 2010 | doi = 10.1016/j.bbmt.2009.11.002 | PMID = 19896545 }}</ref>
*Connective tissue disease, mostly [[rheumatoid arthritis]].
*[[Ulcerative colitis]].
*Drugs - penicillamine.
*Toxins.
*Idiopathic.
 
===Microscopic===
Features:<ref name=pmid16493150>{{Cite journal  | last1 = Visscher | first1 = DW. | last2 = Myers | first2 = JL. | title = Bronchiolitis: the pathologist's perspective. | journal = Proc Am Thorac Soc | volume = 3 | issue = 1 | pages = 41-7 | month =  | year = 2006 | doi = 10.1513/pats.200512-124JH | PMID = 16493150 | url = http://pats.atsjournals.org/cgi/content/full/3/1/41 }}</ref>
#Bronchiolitis - mononuclear and neutrophilic.
#*May be minimal late in the disease.
#Fibrosis - submucosal and peribronchiolar.
#*Can be patchy.
 
Notes:
*Bronchioles = noncartilagenous airways usu. < 2 mm in diameter.<ref name=pmid16493150/>
 
Images:
*[http://pats.atsjournals.org/cgi/content/full/3/1/41/FIG4 Constrictive bronchiolitis (atsjournals.org)].
 
===Stains===
*Elastic trichrome - useful for delineation of obliterated bronchioles.


==Diffuse lung diseases==
==Diffuse lung diseases==
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|
|
|-
|-
|Follicular bronchiolitis/bronchitis
|[[Follicular bronchiolitis/bronchitis]]
|lymphoid cell around bronchioles / bronchus, normal parenchyma
|lymphoid cell around bronchioles / bronchus, normal parenchyma
|interstitial pattern
|interstitial pattern
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|stains to exclude lymphoma; germinal centres do not exclude [[lymphoma]]
|stains to exclude lymphoma; germinal centres do not exclude [[lymphoma]]
|-
|-
|Lymphoma (BALToma)
|Lymphoma ([[BALToma]])
|abundant lymphoid cells usu. in nodules
|abundant lymphoid cells usu. in nodules
|nodules / interstitial pattern
|nodules / interstitial pattern
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==Pulmonary nodular lymphoid hyperplasia==
==Pulmonary nodular lymphoid hyperplasia==
*[[AKA]] pseudolymphoma - a term some dislike.<ref name=afip_vol2_277>AFIP atlas of nontumour pathology. 2002. Vo. 2. P.277. ISBN 1-881041-79-4.</ref>
{{Main|Pulmonary nodular lymphoid hyperplasia}}
===General===
*Definition - reactive lymphoid cells.
 
===Gross/radiology===
*Has nodules radiographically.


===Microscopic===
==Lymphoma of the lung==
Features:<ref name=afip_vol2_277>AFIP atlas of nontumour pathology. 2002. Vo. 2. P.277. ISBN 1-881041-79-4.</ref>
{{Main|Lymphoma of the lung}}
*Reactive lymphoid nodules.
 
Notes:<ref name=afip_vol2_281>AFIP atlas of nontumour pathology. 2002. Vo. 2. P.281. ISBN 1-881041-79-4.</ref>
*Presence of germinal centres do '''not''' exclude lymphoma - may still be a [[BALToma]].
**BALT = bronchial/bronchus associated lymphoid tissue.
 
DDx:
*[[Lymphoma]], specifically [[MALToma|MALTomas/BALTomas]].
*[[Lymphocytic interstitial pneumonia]].
*Follicular bronchiolitis.


=[[Smoking]] associated disease=
=[[Smoking]] associated disease=
{{Main|Smoking}}
{{Main|Smoking}}
*RB = respiratory bronchiolitis.
*Respiratory bronchiolitis (RB).
*RBILD = respiratory bronchiolitis interstitial lung disease.
*[[Respiratory bronchiolitis interstitial lung disease]] (RBILD).
*DIP = desquamative interstitial pneumonia.
*[[Desquamative interstitial pneumonia]] (DIP).
*Eosinophilic granuloma (of lung) - [[AKA]] pulmonary langerhans cell histiocytosis.
*Eosinophilic granuloma (of lung) - [[AKA]] [[pulmonary langerhans cell histiocytosis]].
*[[Smoking-related interstitial fibrosis]] (SRIF).


All of the above are assoc. with smoking.  RBILD & DIP are considered by many to be on a continuum, i.e. RBILD is early DIP.
All of the above are associated with smoking.  RBILD & DIP are considered by many to be on a continuum, i.e. RBILD is early DIP.


==Respiratory bronchiolitis==
==Respiratory bronchiolitis==
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*Talc granulomatosis.
*Talc granulomatosis.
*Sarcoidosis.  
*Sarcoidosis.  
*Wegener granulomatosis.
*[[Granulomatosis with polyangiitis]] (Wegener granulomatosis).


==Sarcoidosis==
==Sarcoidosis==
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=Eosinophilic pneumonia=
=Eosinophilic pneumonia=
Specific entities:<ref name=emedicine301070>[http://emedicine.medscape.com/article/301070-overview http://emedicine.medscape.com/article/301070-overview]</ref>
Specific entities:<ref name=emedicine301070>[http://emedicine.medscape.com/article/301070-overview http://emedicine.medscape.com/article/301070-overview]</ref>
*[[Churg-Strauss syndrome]].
*[[Eosinophilic granulomatosis with polyangiitis]] (Churg-Strauss syndrome).
*Acute eosinophilic pneumonia.
*Acute eosinophilic pneumonia.
*Chronic eosinophilic pneumonia.
*Chronic eosinophilic pneumonia.
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