\n\n
图1
\n\n图2
\n\n \n\n根据病理类型,食管癌主要分为鳞癌和腺癌,腺癌又可分为单纯腺癌、腺鳞癌、黏液表皮样癌和腺样囊性癌等 4 个亚型。食管癌还有少部分其他病理类型,如基底细胞癌、神经内分泌癌、食管肉瘤等,都非常少见。
\n\n鳞癌是形成于食管鳞状细胞的肿瘤,通常在发生在中部或上部的生理性或病理性狭窄处。在中国,90% 左右的食管癌为鳞癌[1]。
\n\n腺癌是发生在食管黏膜下,或者来自贲门腺体的恶性肿瘤。腺癌为欧美国家的主流类型[2]。
\n\n了解更多鳞癌和腺癌的区别,请阅读:
\n\n \n\n临床上,医生还会根据内镜下观察到的形态或切除后标本的形态,来对食管癌进行分型。分型的意义在于,选择最适合的治疗方法,以及判断治疗后的结局。
\n\n很早以前,医生把食管癌分为早期分型和中晚期分型。早期包括隐伏型、糜烂型、斑块型、乳头型;中晚期包括髓质型、蕈伞型、溃疡性、缩窄型、腔内型、未定型等,但现在用的不是很多了。
\n\n如今,医生可以在内镜下直接判断病变情况,临床上常参考两份指南:一份是日本食管癌协会的指南[3],另一份是中国的指南共识[4]。作为东亚的邻居,日本食管癌的发病情况与中国非常类似,也以鳞癌为主,在诊疗上具有参考价值。
\n\n综合这两份指南,现在常把早期食管癌分为 3 种类型[4],即高于 1.2 mm 的隆起型(细分为带蒂的和无蒂的);深度大于 0.6 mm 的凹陷型;介于两者之间的平坦型,平坦型又可分为浅表隆起型(高于平面高度少于 1.2 mm )、完全平坦型、浅表凹陷型(低于平面高度小于 0.6 mm )(图3)。
\n\n图3
\n\n进展期食管癌可分为隆起型、局部溃疡型、溃疡浸润型、弥漫浸润型、未定型[3](图4)。
\n\n图4
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