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PLCHPulmonary Langerhans Cell Histiocytosis (lung disease)
PLCHPublic Library of Cincinnati and Hamilton County (Ohio)
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Most of the available data on PLCH are derived from patients with the nodular and cystic forms of the disease (presumed to be "earlier" disease manifestations), and data on PLCH with significant fibrosis are limited to case reports and a few small studies.
The most common radiologic findings in PLCH are cysts and nodules.
To the best of our knowledge, the report regarding MAP2K1 mutations in single-system PLCH was seldom and a new mutation site was identified (code “CAG” to “CAA” at position 610 in exon 2 of MAP2K1 ).
Persisting uncertainty about the pathogenesis of PLCH has limited current treatment alternatives.
Typically, PLCH is a disease of adult smokers that usually occurs without other organ involvement.
High-resolution computed tomography (HRCT) scan performed for better characterization of the lung parenchymal lesion showed bilateral multiple cysts of variable sizes and shapes interspersed with nodules, a feature characteristic of PLCH [Figure 2]a, and minimal right pleural effusion [Figure 2]b.
8) PLCH is thought to be a reactive immune process due to tobacco smoke's antigenic properties.
qRT-PCR was performed on the synthesized cDNA to determine the relative transcription levels of the biofilm, forming encoding genes: cupAland lasl and virulence factor encoding genes: rhlA, lasB, plcH, and aprA in the six selected P.
We will review the clinical, radiologic, and histopathologic features of PLCH and the value of biopsies in the diagnosis of the disease.
The incidence of PLCH peaks in young adults between ages 20-40.
The stellate shape of PLCH lesions (f) may be obscured by surrounding fibrosis; however, (g) even in the absence of obvious Langerhans' cells, the typical polymorphous mixture of lymphocytes, plasma cells, and eosinophils (arrowheads) is diagnostic (hematoxylin-eosin, original magnifications X12.
It has been unclear whether there is a gender bias in this disease process, although some recent studies suggest that PLCH is more common in women.