推荐回答(5个)
HCG是人绒毛膜促性腺激素,是由胎盘的滋养层细胞分泌的一种糖蛋白。孕期HCG会增多。从您的末次月经看,截止到化验当天(4.27)是6周多,HCG应该在15000-200000之间。癌胚抗原(carcinoembryonic antigen,CEA)是一种MW为150K~300KD的糖蛋白,45%为蛋白质,含有岩藻糖、甘露糖、半乳糖以及唾液酸。研究表明它的组分并非单一。CEA的编码基因位于19号染色体。1965年Gold和Freedman首先自人结肠癌组织发现,是胚胎性致癌抗原。主要存在于胎儿消化道上皮组织、胰脏和肝脏。正常成人血清中CEA含量极低,而失去极性的癌细胞分泌CEA进入血液和淋巴,导致血中CEA水平增高。
临床应用:
结肠癌
结肠癌患者70%~90%显示CEA高度阳性;
血清CEA水平变化与结肠癌Duke分期密切相关。升高时主要见于中晚期肿瘤进展期结肠癌(Duke分期 C、D期)时阳性率可达70%以上,而Duke A、B期时敏感性只有30%左右
对于CEA升高的结肠癌患者,血清CEA水平与癌肿大小、有无转移存在一定关系,当发生肝转移时,CEA升高更为明显。
其他肿瘤
其他消化道肿瘤也可检测到CEA阳性,如:大肠癌患者可达65%-75%的阳性。CEA与大肠癌的Duke分期有明确关系,可用于治疗效果的监测;
内胚层衍生的癌,如胰腺癌、肺癌以及胃癌可导致CEA水平增高;
非内胚层衍生的癌,如乳腺癌和子宫癌也能使CEA水平增高;
良性肿瘤10%-20%,以及某些内胚层发生的重症可以导致CEA增高;
CEA检测对肿瘤术后复发敏感性很高,可达80%以上。往往早于临床、病理检查、X光检查等。
非肿瘤疾病
肠道炎症、肾功不全、结肠息肉、肝硬化、慢性肝炎、闭锁性黄疸等也可导致CEA水平增高
其他
妊娠、大量吸烟也可引起CEA水平增高
总之:CEA并非一种癌的特异性抗原,而是癌的一种相关抗原。缺少特异性,不能作为肿瘤的筛选指标。而是用于肿瘤患者的监测,疗效的判断。
你好,HCG又叫绒毛膜促性腺激素,只有怀孕以后才会有的一个特殊的激素,通过HCG的检测可以用来明确患者是否怀孕。
另外它也是一个灵敏的指标来监测胚胎的活性。一般来讲如果怀孕之后,HCG从生理的角度来讲,平均每48~72小时是要翻倍增长的。
病情分析:
HCG即人绒毛膜促性腺激素。是确认是否怀孕的重要指标。意见建议:一般来说,HCG是测定怀孕与否的标志之一。一般非孕妇女的HCG值<100IU/L,妊娠最初3个月内,HCG水平每2天约升高一倍。怀孕40天后一般来说>5000IU/L
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