Langerhans cell histiocytosis diagnosis is supported by clinicaldata correlate with results of morphological, immunohistochemical,electronooptice.
For a positive diagnosis is mandatory puncture-biopsy of skin lesions or bone lesions curetarea. Biopsy fragment will be stainedwith haematoxylin-eosin and subsequently examined in optical microscope.
Lung lavage also reveals the presence Langherhans cells withnuclei and incizuri polilobati the nuclear membrane, nuclearchromatin dispersed, highlighting just is not enough for diagnosis.
Marrow damage is evidenced by the performance of bone marrowbiopsy. Confirmation of this localization is a serious prognosticfactor.
Thymus cell infiltration is demonstrated even by autopsyLangherhans deceased patients with Langerhans cell histiocytosiswith.
The diagnosis of certainty involves performing additional tests ofthe second imunohistiochimie: S100 protein ATPase andhighlighted by special stain, and identification marker CD1a,Langerhans histiocitelor considered characteristic.
It requires examination in electron microscopy for evidence ofbiopsy fragment Birbeck granules. This is a last step in diagnosis.
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