鼻咽癌肝转移的声像图特征分析

回顾了４５例鼻咽癌肝转移的超声资料和分析了鼻咽癌肝转移的数目、大小、内部回声、形态、在肝脏内的分布、肝脏和脾脏的大小。４５例中，单个病灶５例，２个病灶者３例，３个及３个以上病灶者３７例，分别占１１％、７％和８２％。病灶居右叶者２１例，占４６％。肿瘤大小０．７～８．０ｃｍ不等。６例为低回声，１７例为高回声，１０例中心出现液化性无回声，分别占１３％、３８％和２２％。鼻咽癌肝转移虽然回声表现多样各异，但以肝右叶弥漫性多发大小不等为常见。直径＜１．０ｃｍ的肿瘤以低回声多见。直径位于１．０～３．０ｃｍ者高回声多见，直径＞３．０ｃｍ的转移灶３６％出现囊性变。超声检查尤其可以发现临床尚属隐匿期的鼻咽癌肝转移。

Ultrasonographic Analysis of Hepatic Metastasis from Nasopharyngeal Carcinoma

The sonographic characteristics of 45 patients with hepatic metastases from nasopharyngeal carcinoma were studied retrospectively. The number,size, inner echo, morphology and distribution of the tumors in hepatic parenchyma were analyzed. The size of liver and spleen was measured. Three or more metastatic nodules distributed in the hepatic parenchyma were found in 37(82%) cases. Two nodules were shown in 3(7%) cases. 5(11%) cases had single nodule. 21(46%) of the metastatic lesions located in the right lobe of the liver. The size of metastatic nodules varied from 0.7 cm to 8.0 cm. In 6(13%) cases, the intensity of echo in the metastatic nodules was lower than that of surround liver parenchyma, while that in 17(38%)cases were hyperechoic. In 10 cases (22%), cystic echo appeared in the center of tumor.The ultrasonographies of hepatic metastases from nasopharyngeal carcinoma varied. Multiple nodules disseminated in the right lobe were frequently seen. The metastatic nodules with diameter<1.0 cm often revealed hypoechoic pattern while those >3.0 cm showed cystic change in 36% of cases. Clinically latent hepatic metastasis from nasopharyngeal carcinoma can be detected by the ultrasonography.