The Study Of Ultrasonic Imaging In The Diagnosis Of Abdominal Tumor Of Children

As a serious disease threaten to human health, tumor has become one of the common causes to death,it's also serious in children.In developed countries, malignant tumor is the second cause of death, and the third cause of death in China. Abdominal tumor of children occupy an important place in the children tumors.Related to multiple systems and organs, such as the digestive system, urinary system, reproductive system, lymphatic system and the retroperitoneal space. Abdominal mass is the main clinical manifestations usual. For abdominal tumors in children, early treatment is extremely important, and early diagnosis is a prerequisite for early treatment. At present, Imaging examination is an important method for the diagnosis to abdominal tumor of children, Ultrasound is a common and simple means of imaging, which can provides so much information of tumor .Ultrasonography has the advances of safe, convenient, rapid, non-invasive, non-specific contraindication and easy to repeat .Two-dimensional ultrasound is the primary meathod to the diagnosis of abdominal tumors of children, it can preliminary judge the nature of tumor by the size, site and the source of the tunor, and the relationship with the surrounding organsof the tumor. It has certain meaning in the identification of benign or malignant tumors .For malignant tumor, it can observe if there are metastasis lesions ,which can provide according as clinical treatment programs .Color Doppler ultrasound can observe the distribution ,direction and the nature of blood flow dynamicly and intuitivly. In the process of diagnosising the abdominal tumors in children, the application of color Doppler ultrasound can observe the blood supply within the tumor, which have certain significance in identification of benign or malignant tumor. Application of color Doppler ultrasound can also observe blood flow around T the tumor, understanding relationship between tumor and the great vessels, judge whether there are large blood vessels infiltration,which have important meaning in determination of the condition and direction of the treatment .The Study analyzed a larger sample data of pediatric patients with abdominal tumor in clinical and ultrasound, studied the performance characteristics of the ultrasound .Discussion the value of abdominal ultrasonography in diagnosis of children tumor in the clinical, Designed for accumulation information of ultrasound diagnosis,and providing the accurate and reliabiable information of ultrasound diagnosis in further.Confirmed by surgery and pathology of 102 cases of abdominal tumors of children as research subjects. 51 cases of boys, 51 cases of girls; the age of 12 days-15 Year-old, The average age of 3.1 years. After all the research admitted to hospital,patients Were carried out abdominal ultrasonography. Inspection methods include two-dimensional ultrasound and color Doppler ultrasound.all cases were analyzed of clinical data and ultrasound data.The results showed that: Most children abdominal tumor are malignant, more than 60%.The highest incidence of tumor are Wilms tumor, retroperitoneal teratoma, neuroblastoma tumors and ovarian teratoma, Accounted for 74.5% of all cases, In these four tumors, malignant tumors are accounted for the vast majority of, The result is 88%. Most children with abdominal tumors occurred in the 3-year-old,the result is 66% in this article,Wilms tumor, retroperitoneal teratoma, neuroblastoma tumors, Within three years of age accounted for 79%. Older children with ovarian teratoma, 67% in 4-15 year-old.The proportion of boys and girls has no significant difference . Abdominal pain and vomiting are the most common symptoms in cases, Abdominal mass is the most common signs.Two-dimensional audio-visual of the abdominal tumors in children: Wilms tumor imaging is generally round or oval, the internal of the tumor are substantive echo, when there are more liquefied organization, the tumor showed mixed cystic and Substantive echo.There are eight cases of cystic Wilms tumor in the study, The tumor imaging see more diffuse distribution of atrial cyst.Neuroblastoma tumors were lobulated imaging, the tumor size is larger, located in Retroperitoneal, general internal substantive heterogeneity hypoechoic echo or mixed echo. Retroperitoneal teratoma sonographic changes: the tumor may generally lobulate in shape, General for the internal substantive mixture or mixed cystic and solid echo, Rough and large internal echo, Most ovarian tumors were cystic teratoma or mixed cystic-solid audiovisual, a simple substantive echo is uncommon. Retroperitoneal teratoma with malignant transformation occurred in part, In this study, there are six cases of malignant transformation in 15 cases.5 cases of mesenteric lymphatic cyst Audio-visual shows are more than 6cm cyst,, Irregular, thin-walled cysts, four cases can be seen internal segregation, Cavity through the sound is poor. Ultrasound diagnosis of mesenteric cyst should pay attention to the differentiation with other abdominal cystic tumor of children .Intestinal duplication is a congenital malformation, its clinical performance and audio-visual are similar with abdominal cystic tumor. Intestinal duplication is similar with sonographic mesenteric cyst. The key of identifing the two is: Cyst wall of I ntestinal duplication deformity is intestinal bowel wall echo.Color Doppler flow imaging observation of abdominal tumors in children :Internal flow signal in benign tumor was not obvious, malignant tumors have rich blood supply in general. Information in this study: color Doppler imaging examination of patients with 83 cases, Tumor imaging showed substantial or mixed cystic and solid. 29 cases of benign tumors, blood flow signals detected 6 cases of positive, 23 cases of negative; 54 cases of malignant tumor, blood flow signals detected 38 cases of positive, 16 cases of negative.Malignant abdominal tumor in children are more than benign abdominal tumor. The majority of benign tumor show cystic echo, majority of malignant tumor show substantive non-homogeneous echo, Irregular shape, rich internal blood; Children with abdominal tumor in retroperitoneal tumor located in a large proportion, most of Retroperitoneal tumors are malignant tumors. Ultrasonography has big significance in the determination of retroperitoneal tumor. Identifying the retroperitoneal tumor benign or malignant ,need comprehensive analysis of all aspects of audio-visual features of the tumor.