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| *Abbreviated ''LAM''. | | *Abbreviated ''LAM''. |
| *[[AKA]] lymphangiomyomatosis. | | *[[AKA]] lymphangiomyomatosis. |
| | | {{Main|Lymphangioleiomyomatosis}} |
| ===General===
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| *Clinical: [[dyspnea]], recurrent pneumothorax.
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| *May be an indication for lung transplantation.
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| *Non-neoplastic muscle proliferation vs. tumour that can metastasize.<ref name=pmid20235883>{{Cite journal | last1 = Taveira-DaSilva | first1 = AM. | last2 = Pacheco-Rodriguez | first2 = G. | last3 = Moss | first3 = J. | title = The natural history of lymphangioleiomyomatosis: markers of severity, rate of progression and prognosis. | journal = Lymphat Res Biol | volume = 8 | issue = 1 | pages = 9-19 | month = Mar | year = 2010 | doi = 10.1089/lrb.2009.0024 | PMID = 20235883 }}</ref>
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| Notes:
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| *Considered to be a [[PEComa]].
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| ====Epidemiology====
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| *Associated with [[angiomyolipoma]]s.<ref name=emedicine299545>[http://emedicine.medscape.com/article/299545-overview http://emedicine.medscape.com/article/299545-overview]</ref>
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| *Associated with [[tuberous sclerosis]]<ref name=emedicine299545/> - abnormality in same gene (TSC2).
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| *Usually affects women - primarily in childbearing years; case reports of LAM in men - usu. with [[TSC]].<ref name=pmid17431222>{{Cite journal | last1 = Schiavina | first1 = M. | last2 = Di Scioscio | first2 = V. | last3 = Contini | first3 = P. | last4 = Cavazza | first4 = A. | last5 = Fabiani | first5 = A. | last6 = Barberis | first6 = M. | last7 = Bini | first7 = A. | last8 = Altimari | first8 = A. | last9 = Cooke | first9 = RM. | title = Pulmonary lymphangioleiomyomatosis in a karyotypically normal man without tuberous sclerosis complex. | journal = Am J Respir Crit Care Med | volume = 176 | issue = 1 | pages = 96-8 | month = Jul | year = 2007 | doi = 10.1164/rccm.200610-1408CR | PMID = 17431222 }}</ref>
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| *Rare.
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| ===Radiology===
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| *Bullae/thin walled cysts - distributed in all lung fields.
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| *Lymphadenopathy.
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| Radiologic DDx (of cysts):
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| *[[Eosinophilic granuloma]] - associated with [[smoking]].
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| *[[Usual interstitial pneumonia]] (UIP).
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| *[[Emphysema]].
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| ===Microscopic===
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| Features:<ref>[http://emedicine.medscape.com/article/299545-diagnosis http://emedicine.medscape.com/article/299545-diagnosis]</ref>
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| *Spindle cells with small nuclei + larger epithelioid cells with clear cytoplasm and round nuclei.
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| *Cyst formation.
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| *Thick arterial walls.
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| ====Images====
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| <gallery>
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| Image:Lymphangioleiomyomatosis - very low mag.jpg| LAM - very low mag. (WC)
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| Image:Lymphangioleiomyomatosis - low mag.jpg| LAM - low mag. (WC)
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| Image:Lymphangioleiomyomatosis - intermed mag.jpg| LAM - intermed. mag. (WC)
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| Image:Lymphangioleiomyomatosis - very high mag.jpg| LAM - very high mag. (WC)
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| </gallery>
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| www:
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| *[http://www.nature.com/modpathol/journal/v19/n6/fig_tab/3800610f3.html LAM (nature.com)].
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| *[http://path.upmc.edu/cases/case111.html LAM - several images (upmc.edu)].
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| ===IHC===
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| *HMB-45 +ve.
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| *ER +ve.
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| *PR +ve.
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| *SMA +ve.
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| ==Pulmonary alveolar proteinosis== | | ==Pulmonary alveolar proteinosis== |