双语教学

Explain of Neoplasia

3. Squamous metaplasia, larynx, microscopic

The first step toward neoplasia is cellular transformation. Here, there is metaplasia of normal respiratory laryngeal epithelium on the right to squamous epithelium on the left in response to chronic irritation of smoking. Metaplasia is the exchange of normal epithelium for another type of epithelium. Metaplasia is reversible when the stimulus for it is taken away.

（本图片资料来源自美国犹他大学）