【摘 要】
：
ＣＡ１９ ９是一种胃肠道的肿瘤相关抗原 ,由糖链乳酸 Ｎ 岩澡戊糖唾液酸联结构成 ,分子量为３００～５００万［１］。临床研究显示ＣＡ１９ ９与胰腺癌的关系最为密切 ,与胆囊癌、胆管癌、胃癌、结直肠癌也有一定的相
【机 构】
：
无锡市第三人民医院!214041,江苏省原子医学研究所!214063,江苏省原子医学研究所!214063,江苏省原子医学研究所!214063,江苏省原子医学研究所!214063
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ＣＡ１９ ９是一种胃肠道的肿瘤相关抗原 ,由糖链乳酸 Ｎ 岩澡戊糖唾液酸联结构成 ,分子量为３００～５００万［１］。临床研究显示ＣＡ１９ ９与胰腺癌的关系最为密切 ,与胆囊癌、胆管癌、胃癌、结直肠癌也有一定的相关性［２］。进一步研究发现 ,ＣＡ１９ ９含量的高低对上
CA19 9 is a gastrointestinal tumor-associated antigen consisting of a pentose sugar lactic acid N-linked pentose sugar sialic acid with a molecular weight of 300 to 5 million [1]. Clinical studies have shown that CA19 9 is most closely related to pancreatic cancer and has a certain correlation with gallbladder cancer, bile duct cancer, gastric cancer, and colorectal cancer [2]. Further research found that the level of CA19 9 is high and low
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