Atypical
Pneumonia
Epidemiology:
Common sites:
Gross features:
- variable pattern
of involvement
- affected areas are
red-blue
- pleura usually
uninvolved
Histologic features:
- predominantly
interstitial inflammation
- widened,
edematous alveolar septa
- mononuclear
infiltrate of lymphocytes, histiocytes, and
occasionally plasma cells
- neutrophils may be present in acute cases
- often intra-alveolar
proteinaceous material
- cellular exudates
- pink hyaline membranes
lining the alveolar walls
Immunophenotype:
Marker:
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Sensitivity:
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Specificity:
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Molecular features:
Other features:
References: