Difference between revisions of "Pulmonary Langerhans cell histiocytosis"

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{{ Infobox diagnosis
| Name      = {{PAGENAME}}
| Image      =
| Width      =
| Caption    =
| Synonyms  =
| Micro      =
| Subtypes  =
| LMDDx      =
| Stains    =
| IHC        =
| EM        =
| Molecular  =
| IF        =
| Gross      =
| Grossing  =
| Staging    =
| Site      = [[lung]] - see ''[[medical lung diseases]]''
| Assdx      =
| Syndromes  =
| Clinicalhx =
| Signs      =
| Symptoms  =
| Prevalence = uncommon
| Bloodwork  =
| Rads      = upper lung zones
| Endoscopy  =
| Prognosis  = good with smoking cessation
| Other      =
| ClinDDx    =
| Tx        =
}}
'''Pulmonary Langerhans cell histiocytosis''' is an uncommon [[smoking|smoking-related lung disease]].
'''Pulmonary Langerhans cell histiocytosis''' is an uncommon [[smoking|smoking-related lung disease]].


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==IHC==
==IHC==
*Langerhans cells: S100+ and CD1a+.<ref name=Ref_PPP237>{{Ref PPP|237}}</ref>
*Langerhans cells: S100 +ve and CD1a +ve.<ref name=Ref_PPP237>{{Ref PPP|237}}</ref>


==See also==
==See also==

Revision as of 06:10, 23 December 2015

Pulmonary Langerhans cell histiocytosis
Diagnosis in short
Site lung - see medical lung diseases

Prevalence uncommon
Radiology upper lung zones
Prognosis good with smoking cessation

Pulmonary Langerhans cell histiocytosis is an uncommon smoking-related lung disease.

It is also known as eosinophilic granuloma of the lung.

General

Subtypes:[1]

  • Cellular form.
  • Fibrotic form.

One form usually predominates.

Radiology

  • Upper lung zones.

Microscopic

Features:[2]

  • Cellular peribronchiolar nodules with:
    • Langerhans cells - key feature:
      • Pale staining nucleus (H&E) with nuclear infolding - "crumpled tissue paper" appearance.
    • +/-Smoker's macrophages (brown pigmented airspace macrophages).
    • +/-Eosinophilia (may be rare) - significantly narrow DDx.
    • Chronic inflammatory cells (lymphocytes). (???)

Images:

IHC

  • Langerhans cells: S100 +ve and CD1a +ve.[2]

See also

References

  1. 1.0 1.1 Leslie, Kevin O.; Wick, Mark R. (2004). Practical Pulmonary Pathology: A Diagnostic Approach (1st ed.). Churchill Livingstone. pp. 234. ISBN 978-0443066313.
  2. 2.0 2.1 Leslie, Kevin O.; Wick, Mark R. (2004). Practical Pulmonary Pathology: A Diagnostic Approach (1st ed.). Churchill Livingstone. pp. 237. ISBN 978-0443066313.