Squamous cell carcinoma arises from the stratified squamous epithelium.

食管癌起源于复层皮。

Squamous cell carcinoma, as you can tell by its name, arises from squamous epithelium.

细胞癌（癌）正如其名，来源于皮细胞。

Now, squamous cell carcinoma is the most common type of esophageal cancer worldwide, and it originates in the squamous epithelium of the esophagus, most often in the upper two thirds.

癌是世界最常食管癌类型，来源于食管皮层，最常于食管三分之二。

Specific risk factors for squamous cell carcinoma include alcohol consumption, hot fluids and caustic strictures, which is the narrowing of the esophagus following ingestion of a caustic substance, like household bleach.

而癌特有险因素包括饮酒、高温液体与腐蚀性食管狭窄，即摄入腐蚀性液体（如家用漂白剂）后导致食管狭窄。

Over time, just like with squamous cell carcinoma, mutations might accumulate in either tumor suppressor genes or proto-oncogenes that control the division of these metaplastic cells, ultimately resulting in a malignant tumor.

长此以往，和食管癌一样，抑癌基因和原癌基因会积累一系列突变，那些控制着化生细胞细胞周期基因突变最终会导致恶性肿瘤。