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| ==Bronchiectasis== | | ==Bronchiectasis== |
| ===General===
| | {{Main|Bronchiectasis}} |
| *Benign.
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| *Uncommon.
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| *Predisposes for infection.<ref name=Ref_PBoD8_693>{{Ref PBoD8|693}}</ref>
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| **Usually a mixed flora.
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| **May be predominantly fungal, e.g. ''allergic bronchopulmonary [[aspergillosis]] (ABPA)''.
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| *Multitude of causes - including:
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| **[[Cystic fibrosis]] - typically diffusely involvement, unlike other causes.<ref>URL: [http://library.med.utah.edu/WebPath/LUNGHTML/LUNG053.html http://library.med.utah.edu/WebPath/LUNGHTML/LUNG053.html]. Accessed on: 21 February 2012.</ref>
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| **[[Primary ciliary dyskinesia]].
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| ===Gross===
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| *Large airways at the periphery of the lung.
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| *Central airways larger than the adjacent arteries.
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| *Typically focal.
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| Radiologic:
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| *Central airways larger than the adjacent arteries.
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| *Airway wall-thickening.<ref>{{Cite journal | last1 = Stockley | first1 = RA. | title = Commentary: bronchiectasis and inflammatory bowel disease. | journal = Thorax | volume = 53 | issue = 6 | pages = 526-7 | month = Jun | year = 1998 | doi = | PMID = 9713456 }}</ref>
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| *"Tree-in-bud" abnormalities.
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| ====Images====
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| <gallery>
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| Image:Bronchiectasis.jpg | Bronchiectasis. (WC)
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| </gallery>
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| www:
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| *[http://library.med.utah.edu/WebPath/LUNGHTML/LUNG053.html Bronchiectasis (utah.edu)].
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| ===Microscopic===
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| Features:
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| *Dilated airways.
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| **Airways larger than arteries.
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| ====Image====
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| www:
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| *[http://library.med.utah.edu/WebPath/LUNGHTML/LUNG054.html Bronchiectasis (utah.edu)].
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| ==Pulmonary hemorrhage== | | ==Pulmonary hemorrhage== |
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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:
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| **BOOP: clogs the airway, has Masson bodies, treated with steroids - good prognosis.
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| **Constrictive bronchiolitis: fibrosis around airways, crappy prognosis.
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| *No good treatment.
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| *Progressive.
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| Etiology/associations:<ref name=pmid16493150/>
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| *Post-infectious.
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| **Viral, e.g. [[Adenovirus]].
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| **Mycoplasma.
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| *Post-lung transplant.<ref name=pmid19896545/>
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| *Post-hematopoietic stem cell transplantation
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| **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>
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| *Connective tissue disease, mostly [[rheumatoid arthritis]].
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| *[[Ulcerative colitis]].
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| *Drugs - penicillamine.
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| *Toxins.
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| *Idiopathic.
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| ===Microscopic===
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| 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>
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| #Bronchiolitis - mononuclear and neutrophilic.
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| #*May be minimal late in the disease.
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| #Fibrosis - submucosal and peribronchiolar.
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| #*Can be patchy.
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| Notes:
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| *Bronchioles = noncartilagenous airways usu. < 2 mm in diameter.<ref name=pmid16493150/>
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| Images:
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| *[http://pats.atsjournals.org/cgi/content/full/3/1/41/FIG4 Constrictive bronchiolitis (atsjournals.org)].
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| ===Stains===
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| *Elastic trichrome - useful for delineation of obliterated bronchioles.
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| ==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===
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| *Definition - reactive lymphoid cells.
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| ===Gross/radiology===
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| *Has nodules radiographically.
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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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| *Reactive lymphoid nodules.
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| Notes:<ref name=afip_vol2_281>AFIP atlas of nontumour pathology. 2002. Vo. 2. P.281. ISBN 1-881041-79-4.</ref>
| | ==Lymphoma of the lung== |
| *Presence of germinal centres do '''not''' exclude lymphoma - may still be a [[BALToma]].
| | {{Main|Lymphoma of the lung}} |
| **BALT = bronchial/bronchus associated lymphoid tissue.
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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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| *Follicular bronchiolitis.
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| =[[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). |
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| 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. |
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| ==Respiratory bronchiolitis== | | ==Respiratory bronchiolitis== |
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| *Talc granulomatosis. | | *Talc granulomatosis. |
| *Sarcoidosis. | | *Sarcoidosis. |
| *Wegener granulomatosis. | | *[[Granulomatosis with polyangiitis]] (Wegener granulomatosis). |
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| ==Sarcoidosis== | | ==Sarcoidosis== |
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| *[[AKA]] ''benign sclerosing pneumocytoma''.<ref name=pmid6291188>{{Cite journal | last1 = Chan | first1 = KW. | last2 = Gibbs | first2 = AR. | last3 = Lo | first3 = WS. | last4 = Newman | first4 = GR. | title = Benign sclerosing pneumocytoma of lung (sclerosing haemangioma). | journal = Thorax | volume = 37 | issue = 6 | pages = 404-12 | month = Jun | year = 1982 | doi = | PMID = 6291188 }}</ref> | | *[[AKA]] ''benign sclerosing pneumocytoma''.<ref name=pmid6291188>{{Cite journal | last1 = Chan | first1 = KW. | last2 = Gibbs | first2 = AR. | last3 = Lo | first3 = WS. | last4 = Newman | first4 = GR. | title = Benign sclerosing pneumocytoma of lung (sclerosing haemangioma). | journal = Thorax | volume = 37 | issue = 6 | pages = 404-12 | month = Jun | year = 1982 | doi = | PMID = 6291188 }}</ref> |
| *Previously known as ''sclerosing hemangioma''. | | *Previously known as ''sclerosing hemangioma''. |
| ===General===
| | {{Main|Pneumocytoma}} |
| *Derived from type 2 pneumocyte.<ref name=pmid15138814>{{Cite journal | last1 = Yamazaki | first1 = K. | title = Type-II pneumocyte differentiation in pulmonary sclerosing hemangioma: ultrastructural differentiation and immunohistochemical distribution of lineage-specific transcription factors (TTF-1, HNF-3 alpha, and HNF-3 beta) and surfactant proteins. | journal = Virchows Arch | volume = 445 | issue = 1 | pages = 45-53 | month = Jul | year = 2004 | doi = 10.1007/s00428-004-1023-3 | PMID = 15138814 }}</ref>
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| *Progesterone-receptor positive stromal cells.<ref name=pmid15731902>{{Cite journal | last1 = Einsfelder | first1 = BM. | last2 = Müller | first2 = KM. | title = ["Pneumocytoma" or "sclerosing hemangioma": histogenetic aspects of a rare tumor of the lung] | journal = Pathologe | volume = 26 | issue = 5 | pages = 367-77 | month = Sep | year = 2005 | doi = 10.1007/s00292-005-0751-8 | PMID = 15731902 }}</ref>
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| ====Epidemiology====
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| *Female in 40s.<ref name=pmid19415961>{{Cite journal | last1 = Keylock | first1 = JB. | last2 = Galvin | first2 = JR. | last3 = Franks | first3 = TJ. | title = Sclerosing hemangioma of the lung. | journal = Arch Pathol Lab Med | volume = 133 | issue = 5 | pages = 820-5 | month = May | year = 2009 | doi = | PMID = 19415961 }}</ref>
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| *Considered benign; excision is curative.
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| **Rare case reports of [[metastases]].
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| ===Gross===
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| *Peripheral, solitary.
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| *Well-circumscribed.
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| ===Microscopic===
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| Features:<ref name=pmid19415961>{{Cite journal | last1 = Keylock | first1 = JB. | last2 = Galvin | first2 = JR. | last3 = Franks | first3 = TJ. | title = Sclerosing hemangioma of the lung. | journal = Arch Pathol Lab Med | volume = 133 | issue = 5 | pages = 820-5 | month = May | year = 2009 | doi = | PMID = 19415961 }}</ref>
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| *Mixed cell population.
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| *Variable architecture:
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| **Papillary.
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| **Sclerotic.
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| **Solid.
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| **Hemorrhagic.
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| * +/-Granulomas.
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| DDx:<ref>URL: [http://www.med.muni.cz/biomedjournal/pdf/2004/01/37_42.pdf http://www.med.muni.cz/biomedjournal/pdf/2004/01/37_42.pdf]. Accessed on: 17 June 2010.</ref>
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| *Papillary adenoma.
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| *[[Neuroendocrine tumour]] (carcinoid).
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| Image:
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| *[http://moon.ouhsc.edu/kfung/jty1/Com/ComImage/Com309-1-SM2.gif Pneumocytoma (ouhsc.edu)].<ref>URL: [http://moon.ouhsc.edu/kfung/jty1/Com/Com309-1-Diss.htm http://moon.ouhsc.edu/kfung/jty1/Com/Com309-1-Diss.htm]. Accessed on: 14 April 2012.</ref>
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| ===IHC===
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| Features:<ref name=pmid10716159>{{Cite journal | last1 = Rodriguez-Soto | first1 = J. | last2 = Colby | first2 = TV. | last3 = Rouse | first3 = RV. | title = A critical examination of the immunophenotype of pulmonary sclerosing hemangioma. | journal = Am J Surg Pathol | volume = 24 | issue = 3 | pages = 442-50 | month = Mar | year = 2000 | doi = | PMID = 10716159 }}</ref>
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| *EMA +ve.
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| *PR +ve.<ref name=pmid15731902>{{Cite journal | last1 = Einsfelder | first1 = BM. | last2 = Müller | first2 = KM. | title = [Pneumocytoma or sclerosing hemangioma: histogenetic aspects of a rare tumor of the lung]. | journal = Pathologe | volume = 26 | issue = 5 | pages = 367-77 | month = Sep | year = 2005 | doi = 10.1007/s00292-005-0751-8 | PMID = 15731902 }}</ref>
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| Negative stains:<ref name=pmid10716159/>
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| *SMA -ve.
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| *[[CEA]] -ve.
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| *CD34 -ve.
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| *S100 -ve.
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| *Chromogranin A -ve.
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| Others:<ref name=pmid15138814/>
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| *[[TTF-1]] +ve.
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| *HNF-3 alpha +ve.
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| *HNF-3 beta +ve.
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| ==Lymphangioleiomyomatosis== | | ==Lymphangioleiomyomatosis== |
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| ==Diffuse panbronchiolitis== | | ==Diffuse panbronchiolitis== |
| *Abbreviated ''DPB''. | | *Abbreviated ''DPB''. |
| ===General===
| | {{Main|Diffuse panbronchiolitis}} |
| *Rare lung disease predominantly found among asians.<ref name=pmid17012632 >{{Cite journal | last1 = Poletti | first1 = V. | last2 = Casoni | first2 = G. | last3 = Chilosi | first3 = M. | last4 = Zompatori | first4 = M. | title = Diffuse panbronchiolitis. | journal = Eur Respir J | volume = 28 | issue = 4 | pages = 862-71 | month = Oct | year = 2006 | doi = 10.1183/09031936.06.00131805 | PMID = 17012632 | http://erj.ersjournals.com/content/28/4/862.long }}</ref>
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| *Has been likened to [[cystic fibrosis]] - but doesn't really share any features with it.
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| ===Gross===
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| Features:<ref name=pmid17012632/>
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| *[[Bronchiectasis]].
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| *Hyperinflation.
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| *Small nodules (~2-3 mm) around the small airways.
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| *Diffuse involvement of both lungs.
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| ===Microscopic===
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| Features:<ref name=pmid17012632/>
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| *Transmural inflammation of bronchioles - esp. respiratory bronchioles.
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| **Lymphocytes, plasma cells, histiocytes.
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| *Neutrophils within the airway.
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| Images:
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| *[http://erj.ersjournals.com/content/28/4/862/F1.expansion.html DPB (ersjournals.com)].
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| ==Pulmonary amyloidosis== | | ==Pulmonary amyloidosis== |
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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. |