General
and Systemic Histopathology, C601&C602
Slide 64: Lung with squamous metaplasia
of bronchial mucosa
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The process of metaplasia
is found intermixed with the typical ciliated columnar epithelium. This
is a reactive or adaptive process and not a true malignancy.
What is the definition of metaplasia?
See this slide with the
virtual microscope.
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This picture is of bronchial
mucosa, showing the reactive replacement of one type of epithelium for
another. It is technically not a neoplastic process, although continued
injury of the sort that lead to the metaplasia, can lead to dysplasia and
possibly cancer. Here we see respiratory epithelium being replaced by squamous.
Smoking was the injury that lead to this alteration. Observe the inflammatory
reaction beneath the mucosa. |
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