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当前学科：妇产科
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患者27岁，停经10周，阴道不规则出血10天。妇科检查：子宫增大，软，尿妊娠试验阳性，B超检查见宫腔内充满弥漫分布的光点和小囊样无回声区图像，肌层内可见高回声团块，胸片正常，诊刮病检提示滋养细胞增生，可见绒毛结构。应诊断为（）
A . 侵蚀性葡萄胎
B . 先兆流产
C . 不全流产
D . 绒毛膜癌
E . 良性葡萄胎
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