患儿女,3岁。因排便异常10d,发现骶前肿块7d就诊。查体:骶尾部稍隆起,活动度差,肛诊触及一肿块压迫直肠,边界不清。化验检查:AFP>1210ng/ml,CA19-9为42.16U/ml,CYFRA21-1为14.66ng/ml,NSE为60.94ng/ml。彩超:骶骨前方盆腔内可触及范围约90 mm×60mm实性低回声包块(图1a),边界欠清,形态欠规则,内回声尚均匀,CDFI:内可及较丰富血流信号(图1b)。周围 Children with children, 3 years old. Defecation due to abnormal 10d, found sacral mass 7d treatment. Examination: sacrococcygeal slightly bulging, poor activity, anal mass touched a rectum oppression, the border is unclear. Laboratory tests: AFP> 1210ng / ml, CA19-9 was 42.16U / ml, CYFRA21-1 was 14.66ng / ml, NSE was 60.94ng / ml. Color Doppler ultrasound: sacral anterior pelvic accessible range of about 90 mm × 60mm solid hypoechoic mass (Figure 1a), the border is not clear, the shape of irregular rules, the echo is still uniform, CDFI: within and more abundant blood flow signal (Figure 1b). around