A member asked:

What is different in the windpipe of a smoker and that of a healthy person?

A doctor has provided 1 answer

Many different 1s: The mildest changes are just those of inflammation - grossly they look reddened and slightly swollen, and microscopically there are large numbers of different inflammatory cells (white blood cells of different types). Over time, they may develop neoplastic changes, with increasing numbers of abnormal cells, and ultimately may develop squamous cell cancer.

Answered 11/16/2015

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