Objective to further investigate the relationship between the quantity of free radicals and morphologic alteration of the lung tissue exposed to different oxygen doses.

目的进一步探索高压氧条件下肺组织内自由基量变与组织形态学改变的相互关系。

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Conclusion: Telomerase activation occurred probably before the morphologic alteration, which may imply expansion of the cells with potential of malignant transformation.

结论：端粒酶的激活发生在喉癌的形态学改变之前，可能提示有恶性转化潜能的细胞扩散。

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Morphologic alteration is an important characteristic of apoptosis.

形态改变是细胞凋亡的重要特征之一。

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