Difference between revisions of "Langerhans cell histiocytosis"
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'''Langerhans cell histiocytosis''', abbreviated '''LCH''', is a rare genetic disorder of tissue macrophages. It broadly fits into the category of ''[[histiocytoses]]''. | '''Langerhans cell histiocytosis''', abbreviated '''LCH''', is a rare genetic disorder of tissue macrophages. It broadly fits into the category of ''[[histiocytoses]]''. | ||
==General== | |||
*Looks like eosinophilic granuloma of the lung - see ''[[Medical_lung_diseases#Pulmonary_Langerhans_cell_histiocytosis|medical lung diseases]]''. | *Looks like eosinophilic granuloma of the lung - see ''[[Medical_lung_diseases#Pulmonary_Langerhans_cell_histiocytosis|medical lung diseases]]''. | ||
==Microscopic== | |||
Features: | Features: | ||
*Langerhans cells histiocytes - '''key feature'''. | *Langerhans cells histiocytes - '''key feature'''. | ||
| Line 20: | Line 20: | ||
*See ''[[lymph node pathology]]''. | *See ''[[lymph node pathology]]''. | ||
==IHC== | |||
*CD1a +ve. | *CD1a +ve. | ||
*S100 +ve. | *S100 +ve. | ||
==Electron microscopy== | |||
*[[Birbeck granules]]. | *[[Birbeck granules]]. | ||
Revision as of 02:47, 25 July 2011
Langerhans cell histiocytosis, abbreviated LCH, is a rare genetic disorder of tissue macrophages. It broadly fits into the category of histiocytoses.
General
- Looks like eosinophilic granuloma of the lung - see medical lung diseases.
Microscopic
Features:
- Langerhans cells histiocytes - key feature.
- Clusters of cells (histiocytes) with a reniform (kidney-shaped) nucleus and abundant foamy cytoplasm.
- Nucleus may look like a "coffee bean", i.e. have nuclear grooves (similar to those in papillary thyroid carcinoma) -- appearance dependent on the rotation of the nucleus.[1]
- Chromatin pattern: fine granular, light gray.
- Clusters of cells (histiocytes) with a reniform (kidney-shaped) nucleus and abundant foamy cytoplasm.
- +/-Eosinophils - often prominent.
Images:
DDx:
- Kimura disease - eosinophilia.
- See lymph node pathology.
IHC
- CD1a +ve.
- S100 +ve.
Electron microscopy
See also
References
- ↑ BN. 15 March 2011.