超声造影对高回声肾肿瘤的诊断价值

目的 探讨超声造影对高回声肾良恶性肿瘤的鉴别诊断价值.方法 对19例高回声肾肿瘤的超声造影检查与手术病理结果进行对照分析.结果 11例血管平滑肌脂肪瘤,8例肾透明细胞癌.11例血管平滑肌脂肪瘤中6例显示造影后增强和局部增强,呈快进慢出(6/11);1例表现为快进快出(1/11);4例表现为先增强,随后造影剂廓清完全,呈不增强(与肾皮质对比瘤体呈负显影,4/11).5例肾透明细胞癌均呈快进快出(5/8);2例表现出快进慢出(2/8);1例为完全不增强(负显影,1/8);5例有假包膜.肾透明细胞癌快进快出的比例与肾血管平滑肌脂肪瘤比较差异有统计学意义(P<0.05).而两种肾肿瘤的快进慢出和"负显影"的超声造影表现差异无统计学意义(P>0.05).结论 超声造影对高回声肾肿瘤的鉴别诊断有一定价值,高回声肾肿瘤的超声造影特征仍有待进一步研究.

Contrast-enhanced ultrusonography in the diagnosis of hyperechoic renal tumors

Objective To investigate the value of the diagnosis of contrast-enhanced ultrasound(CEUS) in renal tumors. Methods Nineteen patients with hyperechoic renal tumors detected by CEUS underwent resection for suspected renal malignant and benign tumors. The characterization of hyperechoic renal tumors on CEUS was evaluated. Results Histopathologic results of resected lesions showed benign tumors in 11 patients with angiomyolipoma and malignancy in 8 patients with clear cell carcinoma. Six patients with angiomyolipoma showed rapid wash in contrast enhancement and slow wash out on all tumor and focal tumor (6/11). One patient with angiomyolipoma was observed in rapid wash in and wash out (1/11). Four patients with angiomyolipoma showed rapid wash in and negative contrast enhancement after rapid wash out(negative contrast enhancement compared to renal cortex,4/11). Five patients with clear cell carcinoma showed rapid wash in and wash out (5/8). Two patients with clear cell carcinoma showed rapid wash in and delayed wash out (2/8). One patient with showed no enhancement on CEUS (1/8). The pseudocapsule could be seen at 5 patients with clear cell carcinoma. Wash in enhancement and wash out on clear cell carcinoma were significant in comparison to these of angiomyolipoma (P<0.05). Wash in enhancement,delayed wash out and negative contrast enhancement were no significant between clear cell carcinoma and angiomyolipoma (P>0.05). Conclusions CEUS is useful for discriminating between benign and malignant renal tumor.