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儿童后肾腺瘤影像学表现一例 被引量:4

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摘要 患儿男,3岁,以“外院超声检查发现左肾占位4 d”入院,查体:生长发育正常,皮肤黏膜未见苍白,全腹平软,未及压痛,全腹未及明显包块。双肾区未及叩痛,输尿管径路未及压痛点,耻骨上未及膀胱。常规二维超声检查示(图1):左肾中下部等回声区,向肾外突起,大小:上下径21 mm,前后径19 mm,左右径17 mm,形态规则,边界清晰,未见明显包膜回声,彩色多普勒血流成像示:肿块内未见明显血流信号。超声造影示(图2):注射造影剂7 s后左肾肿块开始出现增强,较皮质晚(注射造影剂5 s后);注射造影剂14 s后肿块增强强度达峰值,较皮质稍晚(注射造影剂13 s后),峰值强度与皮质相仿,峰值持续时间短,注射造影剂15 s后即开始廓清。肿块下部见无灌注区,大小为3.5 mm ×13.0 mm。声辐射力脉冲弹性成像检查示(图3,4):肿块灰阶亮度较肾皮质高,剪切波速度(1.80 m/s)较肾皮质(2.71 m/s)低,提<br>  示质软。超声检查提示:左肾实质性肿块,结合超声造影考虑低度恶性肿瘤可能,不除外肾母细胞瘤。 CT增强扫描示(图5):左肾下极外侧缘见一直径约2.0 cm的类圆形囊实性病灶,边界清晰,内部密度欠均匀,增强扫描病灶中度不均匀强化,同侧肾前筋膜未见增厚,肾盂未见明显扩张积液;腹膜后未见明显肿大淋巴结。考虑恶性可能性大,肾母细胞瘤可能。 MRI增强扫描示(图6):左肾下极外侧缘圆形混杂信号影,T1WI低信号,T2WI、短时间反转恢复序列高信号,与肾皮质同步强化,考虑为肾肿瘤,肾母细胞瘤不除外。血生化检查:神经元特异性烯醇化酶正常(14.84 mg/L);血常规、凝血功能、肝功能正常,肌酐水平轻度降低,中性粒细胞比例轻度降低,C反应蛋白水平轻度升高(9 ng/L),铁蛋白、甲胎蛋白、癌胚抗原水平等正常,乙肝(-),丙肝(-)。
出处 《中华医学超声杂志(电子版)》 2013年第6期507-509,共3页 Chinese Journal of Medical Ultrasound(Electronic Edition)
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参考文献7

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