Difference between revisions of "Lymphangioleiomyomatosis"

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*May be an indication for lung transplantation.
*May be an indication for lung transplantation.
*Non-neoplastic muscle proliferation versus 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>
*Non-neoplastic muscle proliferation versus 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>
*Strong association with [[angiomyolipoma]] of the kidney - often preceeds LAM.<ref name=pmid17003820>{{cite journal |author=Rakowski SK, Winterkorn EB, Paul E, Steele DJ, Halpern EF, Thiele EA |title=Renal manifestations of tuberous sclerosis complex: Incidence, prognosis, and predictive factors |journal=Kidney Int. |volume=70 |issue=10 |pages=1777–82 |year=2006 |month=November |pmid=17003820 |doi=10.1038/sj.ki.5001853 |url=}}</ref>
*In the context of [[tuberous sclerosis]], [[angiomyolipoma]] of the kidney often preceeds LAM.<ref name=pmid17003820>{{cite journal |author=Rakowski SK, Winterkorn EB, Paul E, Steele DJ, Halpern EF, Thiele EA |title=Renal manifestations of tuberous sclerosis complex: Incidence, prognosis, and predictive factors |journal=Kidney Int. |volume=70 |issue=10 |pages=1777–82 |year=2006 |month=November |pmid=17003820 |doi=10.1038/sj.ki.5001853 |url=}}</ref>


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Revision as of 17:03, 10 December 2014

Lymphangioleiomyomatosis
Diagnosis in short

Lymphangioleiomyomatosis. H&E stain.
Synonyms lymphangiomyomatosis
LM spindle cells with small nuclei + larger epithelioid cells with clear cytoplasm and round nuclei, cyst formation, thick arterial walls
IHC HMB-45 +ve, ER +ve, PR +ve, SMA +ve
Site lung - see medical lung diseases
Syndromes tuberous sclerosis
Clinical history almost always women of childbearing age, recurrent pneumothorax
Symptoms dyspnea
Prevalence very rare
Radiology bullae/thin walled cysts distributed in all lung fields, lymphadenopathy
Clin. DDx eosinophilic granuloma, usual interstitial pneumonia, emphysema
Treatment medical therapy, lung transplantation

Lymphangioleiomyomatosis, abbreviated LAM, is a rare lung pathology that predominantly afflicits women of childbearing age.

It is also known as lymphangiomyomatosis.

General

  • Clinical: dyspnea, recurrent pneumothorax.
  • May be an indication for lung transplantation.
  • Non-neoplastic muscle proliferation versus tumour that can metastasize.[1]
  • In the context of tuberous sclerosis, angiomyolipoma of the kidney often preceeds LAM.[2]

Notes:

Clinical DDx:[3]

Treatment:[4]

  • Bronchodilators - symptomatic treatment.
  • mTOR inhibitors. (???)
  • Transplantation.

Epidemiology

Gross/Radiology

  • Bullae/thin walled cysts - distributed in all lung fields.
  • Lymphadenopathy.

Radiologic DDx (of cysts):

Microscopic

Features:[7]

  • Spindle cells with small nuclei + larger epithelioid cells with clear cytoplasm and round nuclei.
  • Cyst formation.
  • Thick arterial walls.

Images

  • LAM - very low mag. (WC)

  • LAM - low mag. (WC)

  • LAM - intermed. mag. (WC)

  • LAM - very high mag. (WC)

www:

IHC

  • HMB-45 +ve.
  • ER +ve.
  • PR +ve.
  • SMA +ve.

See also

References

  1. ↑ Taveira-DaSilva, AM.; Pacheco-Rodriguez, G.; Moss, J. (Mar 2010). "The natural history of lymphangioleiomyomatosis: markers of severity, rate of progression and prognosis.". Lymphat Res Biol 8 (1): 9-19. doi:10.1089/lrb.2009.0024. PMID 20235883.
  2. ↑ Rakowski SK, Winterkorn EB, Paul E, Steele DJ, Halpern EF, Thiele EA (November 2006). "Renal manifestations of tuberous sclerosis complex: Incidence, prognosis, and predictive factors". Kidney Int. 70 (10): 1777–82. doi:10.1038/sj.ki.5001853. PMID 17003820.
  3. ↑ Xu, KF.; Lo, BH. (2014). "Lymphangioleiomyomatosis: differential diagnosis and optimal management.". Ther Clin Risk Manag 10: 691-700. doi:10.2147/TCRM.S50784. PMID 25187723.
  4. ↑ Vlachostergios, PJ.; Rad, BS.; Karimi, K.; Apergis, G. (Oct 2014). "Angiomyolipomas, Renal Cell Carcinomas and Pulmonary Lymphangioleiomyomatosis.". J Clin Diagn Res 8 (10): MJ01. doi:10.7860/JCDR/2014/9733.5021. PMID 25478388.
  5. ↑ 5.0 5.1 http://emedicine.medscape.com/article/299545-overview
  6. ↑ Schiavina, M.; Di Scioscio, V.; Contini, P.; Cavazza, A.; Fabiani, A.; Barberis, M.; Bini, A.; Altimari, A. et al. (Jul 2007). "Pulmonary lymphangioleiomyomatosis in a karyotypically normal man without tuberous sclerosis complex.". Am J Respir Crit Care Med 176 (1): 96-8. doi:10.1164/rccm.200610-1408CR. PMID 17431222.
  7. ↑ http://emedicine.medscape.com/article/299545-diagnosis
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