Snakebite has become a serious public health problem with high mortality and disability rates.Ultrasound can provide imaging basis for diagnosis and treatment of snakebites and relative complications.The application p...Snakebite has become a serious public health problem with high mortality and disability rates.Ultrasound can provide imaging basis for diagnosis and treatment of snakebites and relative complications.The application progresses of ultrasound in snakebites and complications were reviewed in this article.展开更多
Objective: To summarize the clinical experience of diagnosis and treatment of the testicular tumors.Methods: Retrospective analysis of 42 adult patients with testicular cancers was carried out.Results: Ultrasonography...Objective: To summarize the clinical experience of diagnosis and treatment of the testicular tumors.Methods: Retrospective analysis of 42 adult patients with testicular cancers was carried out.Results: Ultrasonography (B-ultrasound and color Doppler flow imaging) was performed on 37 cases. One case was misdiagnosed. Surgical management was carried out in 42 cases and postoperational radiation therapy or chemotherapy was performed. The 1–5 year postoperative survival rate was totally 100%.Conclusion: B-ultrasound, especially color Doppler flow imaging, with the advantages of noninvasiveness and inexpensiveness was most useful and should be firstly employed in diagnosing the testicular tumor. The favorable prognosis can be obtained if an early diagnosis is made and the early treatment is performed. Key words testicular tumor - B-ultrasound - color Doppler flow imaging展开更多
Cholangiocarcinoma is a rare malignancy of the biliary tract. Key factors in determining therapeutic options include knowledge of tumor extent, anatomy and obtaining tissue diagnosis. Endoscopically, there are three m...Cholangiocarcinoma is a rare malignancy of the biliary tract. Key factors in determining therapeutic options include knowledge of tumor extent, anatomy and obtaining tissue diagnosis. Endoscopically, there are three modalities available to make the diagnosis of cholangiocarcinoma. These include endoscopic retrograde cholangiopancreatography, endoscopic ultrasound with fine needle aspiration and cholangioscopy. Management of cholangiocarcinoma endoscopically is typically confined to stent placement for palliative purposes or as a bridge to surgery. In this article, we will review the endoscopic techniques available for the diagnosis and management of cholangiocarcinoma.展开更多
EUS is the most sensitive imaging procedure for the detection of small solid pancreatic masses and is accurate in determining vascular invasion of the portal venous system. Even compared to the new CT-techniques EUS p...EUS is the most sensitive imaging procedure for the detection of small solid pancreatic masses and is accurate in determining vascular invasion of the portal venous system. Even compared to the new CT-techniques EUS provides excellent results in preoperative staging of solid pancreatic tumors. Compared to helical CT-techniques EUS is less accurate in detecting tumor involvement of superior mesenteric artery. EUS staging and EUS-guided FNA can be performed in a single-step procedure, to establish the diagnosis of cancer. There is no known negative impact of tumor cell seeding due to EUS-FNA. Without FNA EUS and additional methods are not able to reliably distinguish between inflammatory and malignant masses.展开更多
Color Doppler flow imaging(CDFI) was performed in 24 patients with Graves' disease and the results were compared with those from 8 patients with Hashimoto's disease, 6 patients with simple diffuse goiter, and ...Color Doppler flow imaging(CDFI) was performed in 24 patients with Graves' disease and the results were compared with those from 8 patients with Hashimoto's disease, 6 patients with simple diffuse goiter, and 15 normal volunteers. All cases were confirmed by clinical, laboratory tests or pathology. CDFI of Graves' disease showed diffuse or localized hypoechoes within the thyroid glands, rich flow signals in the hypoechoes, accelerated flow velocity, and decreased resistance in the superior thyroid arteries(STA) and arteries within the glands. These appearances were characteristic as compared with the controls. The rate of flow in STA of Graves' disease patients was 8 to 10 times higher than that in the normal volunteers. This study demonstrates that CDFI is convenient and efficient as compared with isotope scan and some other laboratory tests, and can be widely used in the diagnosis of Graves' disase.展开更多
The purpose of this study was to determine the efficacy of using an ultrasound contrast agent(levovist)to enhance the color Doppler imaging of liver neoplasms.Thirty patients with hepatic tu...The purpose of this study was to determine the efficacy of using an ultrasound contrast agent(levovist)to enhance the color Doppler imaging of liver neoplasms.Thirty patients with hepatic tumors were enrolled in this study.After intravenous administration of levovist,the color Doppler signals of normal hepatic vessels were enhanced.In various hepatic tumors,the different patterns of tumor vascularity were observed,which had not been demonstrated in conventional non contrast color Doppler imaging.In 11 of 16 patients with hepatocarcinoma,additional color Doppler signals were observed in the central part of the tumors.On the contrary,3 patients with metastatic liver lesions the enhanced color Doppler signals appear only at the peripheral of tumors.A typical rim like color enhancement was seen in 2 of the 3 cases.In six patients with hepatic hemangiomas contrast enhanced color Doppler imaging demonstrated the blood vessels at the margin of the neoplasms.Contrast enhanced color Doppler imaging improves the visualization of the hepatic neoplasm vascularity.This technique holds great promise for detecting small liver tumors and differentiating hepatic neoplasms.展开更多
Objective:To compare the reliability of transvaginal ultrasonography with pelvic arteriography in the assessment of patients with gestational trophoblastic disease. Methods. Transvaginal ultrasonography was performed ...Objective:To compare the reliability of transvaginal ultrasonography with pelvic arteriography in the assessment of patients with gestational trophoblastic disease. Methods. Transvaginal ultrasonography was performed in 24 patients with gestational trophoblastic tumour. Within one week after ultrasound investigation, pelvic arteriography was carried out in each patient. Of 24 cases, 16 patients hadn’t been treated by chemical reagent, 5 had accepted 2 to 5 courses of chemotherapy, and 3 had achieved complete remission before both investigations performed. Results. In 3 patients with complete remission, 2 had no evidence of abnormal findings either on transvaginal ultrasonography or on pelvic arteriography, 1 showed intramyometrial lesions by both methods. In the remaining 21 patients, all demostrated a abnormal uterine image, and 5 of them accompanied with the finding of parametrium metastatic signs by transvaginal ultrasonography; these abnormal results were confirmed by pelvic arteriographic imaging. However, in two cases without clinical and ultrasonic signs of parametrium metastasis, pelvic arteriography indicated the early metastasis of parametrium ves- sels. Conclusions. Even though it is difficult to predict the early parametrium metastasis in patients with gestational trophoblastic disease by B-ultrasonic investigation, our data would support the introduction of transvaginal ultrasonography in the diagnosis and evaluation of gestational trophoblastic tumour.展开更多
AIM:To study the role of time-intensity curve(TIC) analysis parameters in a complex system of neural networks designed to classify liver tumors.METHODS:We prospectively included 112 patients with hepatocellular carcin...AIM:To study the role of time-intensity curve(TIC) analysis parameters in a complex system of neural networks designed to classify liver tumors.METHODS:We prospectively included 112 patients with hepatocellular carcinoma(HCC)(n = 41),hypervascular(n = 20) and hypovascular(n = 12) liver metastases,hepatic hemangiomas(n = 16) or focal fatty changes(n = 23) who underwent contrast-enhanced ultrasonography in the Research Center of Gastroenterology and Hepatology,Craiova,Romania.We recorded full length movies of all contrast uptake phases and post-processed them offline by selecting two areas of interest(one for the tumor and one for the healthy surrounding parenchyma) and consecutive TIC analysis.The difference in maximum intensities,the time to reaching them and the aspect of the late/portal phase,as quantified by the neural network and a ratio between median intensities of the central and peripheral areas were analyzed by a feed forward back propagation multi-layer neural network which was trained to classify data into five distinct classes,corresponding to each type of liver lesion.RESULTS:The neural network had 94.45% training accuracy(95% CI:89.31%-97.21%) and 87.12% testing accuracy(95% CI:86.83%-93.17%).The automatic classification process registered 93.2% sensitivity,89.7% specificity,94.42% positive predictive value and 87.57% negative predictive value.The artificial neural networks(ANN) incorrectly classified as hemangyomas three HCC cases and two hypervascular metastases,while in turn misclassifying four liver hemangyomas as HCC(one case) and hypervascular metastases(three cases).Comparatively,human interpretation of TICs showed 94.1% sensitivity,90.7% specificity,95.11% positive predictive value and 88.89% negative predictive value.The accuracy and specificity of the ANN diagnosis system was similar to that of human interpretation of the TICs(P = 0.225 and P = 0.451,respectively).Hepatocellular carcinoma cases showed contrast uptake during the arterial phase followed by wash-out in the portal and first seconds of the late phases.For the hypovascular metastases did not show significant contrast uptake during the arterial phase,which resulted in negative differences between the maximum intensities.We registered wash-out in the late phase for most of the hypervascular metastases.Liver hemangiomas had contrast uptake in the arterial phase without agent wash-out in the portallate phases.The focal fatty changes did not show any differences from surrounding liver parenchyma,resulting in similar TIC patterns and extracted parameters.CONCLUSION:Neural network analysis of contrastenhanced ultrasonography-obtained TICs seems a promising field of development for future techniques,providing fast and reliable diagnostic aid for the clinician.展开更多
Myelolipoma of the extra-adrenal gland is a rare,benign tumor comprising mature fat tissue and hematopoietic elements.Most myelolipomas are asymptomic and discovered incidentally.We presented a 44-year-old male who wa...Myelolipoma of the extra-adrenal gland is a rare,benign tumor comprising mature fat tissue and hematopoietic elements.Most myelolipomas are asymptomic and discovered incidentally.We presented a 44-year-old male who was admitted to our hospital for right kidney dystrophy and renal calculus.Ultrasound examination of right kidneys showed hydronephrosis.Intravenous pyelography showed the right renal contour was unclear,with a circular high-density shadow inside.The nephrectomy was performed with renal myelolipoma as a final pathologic diagnosis.展开更多
Diagnosis of hepatocellular carcinoma (HCC), a common digestive malignancy, remains a challenge. The aim of this study was to evaluate the feasibility of performing laparoscopy and laparoscopic ultrasound with local a...Diagnosis of hepatocellular carcinoma (HCC), a common digestive malignancy, remains a challenge. The aim of this study was to evaluate the feasibility of performing laparoscopy and laparoscopic ultrasound with local anesthesia as a diagnostic procedure in HCC. Laparoscopy and laparoscopic ultrasound with local anesthesia was performed in the gastrointestinal endoscopy unit in three patients diagnosed of HCC. Endoscopy staged diffuse liver disease. Laparoscopic ultrasonography identified all liver tumors not visible during endoscopy and guided needle biopsy in one case. No complications happened. In conclusion, laparoscopy and laparoscopic ultrasound,performed as a minimally invasive diagnostic procedure can be a safe and very promising tool in planning therapy of HCC.展开更多
Endoscopic ultrasonography is an established diagnostic tool for pancreatic masses and chronic pancreatitis.In recent years there has been a growing interest in the worldwide medical community in autoimmune pancreatit...Endoscopic ultrasonography is an established diagnostic tool for pancreatic masses and chronic pancreatitis.In recent years there has been a growing interest in the worldwide medical community in autoimmune pancreatitis (AIP),a form of chronic pancreatitis caused by an autoimmune process.This paper reviews the current available literature about the endoscopic ultrasonographic findings of AIP and the role of this imaging technique in the management of this protean disease.展开更多
Objective. To evaluate the diagnostic criteria for the localization of acquired arteriovenous fistulas (AVFs) by color Doppler flow imaging (CDFI) based on the features of their hemodynamic changes. Methods. The shape...Objective. To evaluate the diagnostic criteria for the localization of acquired arteriovenous fistulas (AVFs) by color Doppler flow imaging (CDFI) based on the features of their hemodynamic changes. Methods. The shape and hemodynamic changes of involved vessels which could be helpful to localize the sites of fistulas were studied according to the observation of 10 cases of acquired AVFs. Results. The sites of the fistulas could be shown by two dimensional ultrasonography and color flow imaging in 40%and 80%cases, respectively. In all cases, turbulent high velocity flow was present at the sites of the fistulas, low resistant flow was present in the arteries proximal to the fistulas, and artery like flow was detected in the veins. Conclusion. CDFI was accurate for the localization of acquired AVFs, which were mainly localized by their hemodynamic changes shown by pulse Doppler ultrasound.展开更多
Objective.The purpose of this study was to determine the impact of intraoperative ultrasound(IOUS)on the management of patients with neoplasms of the liver. Methods.Forty nine patients ope...Objective.The purpose of this study was to determine the impact of intraoperative ultrasound(IOUS)on the management of patients with neoplasms of the liver. Methods.Forty nine patients operated on for liver or other pathologic processes were examined intraoperatively with 5.0 MHz special ultrasound transducers during surgical exploration of the abdomen.Subjects were evaluated because of known or suspected disease of the liver.Preoperative imaging studies included percutaneous ultrasound(n=49),magnetic resonance imaging(n=11),and computed tomography(n=34).Intraoperative evaluation on all patients included inspection,bimanual palpation,and ultrasonography.Comparison between preoperative imagings and IOUS were analysed. Results.Sensitivity for detection of hepatic neoplasms showed in intraoperative ultrasound,percutaneous ultrasound,magnetic resonance imaging and computed tomography as 100%(23/23),74%(17/23),74%(14/19) and 75%(6/8).Specificity showed 100%(26/26),100%(26/26),93%(14/15) and 67(2/3).In seven patients(14%),the neoplasms were not found by inspection,bimanual palpation,and identified only by IOUS. Conclusions.Intraoperative ultrasound is the most sensitive and specific method for detection and surgery of liver neoplasms,especially the occult neoplasms and small size lesion(<2cm).展开更多
Objective: The aim of the study was to discuss the value of ultrasound examination in the diagnosis of fetal gastric teratoma. Methods: We retrospectively analyzed 2 cases with fetal gastric teratoma in our hospital (...Objective: The aim of the study was to discuss the value of ultrasound examination in the diagnosis of fetal gastric teratoma. Methods: We retrospectively analyzed 2 cases with fetal gastric teratoma in our hospital (Department of Gynecology and Obstetrics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China). It involved clinical, ultrasonic, X-ray, CT and MRI, biochemical, pathological, karyotype and immunohistochemical data. Results: There both were hybrid echo masses in the abdominal of the fetus with the sonography and the ultrasound features which mostly like the teratomas. Two cases were dead after induced abortion. The pathological results of the mass were gastric immature teratoma in one, and stomach mature teratoma in another. Conclusion: Fetal gastric teratoma is rarely seen and easily be misdiagnosed in clinic. The diagnosis depends finally on pathological examination. Ultrasound scan as the easy and direct method is helpful to clew the diagnosis of fetal gastric teratoma.展开更多
文摘Snakebite has become a serious public health problem with high mortality and disability rates.Ultrasound can provide imaging basis for diagnosis and treatment of snakebites and relative complications.The application progresses of ultrasound in snakebites and complications were reviewed in this article.
文摘Objective: To summarize the clinical experience of diagnosis and treatment of the testicular tumors.Methods: Retrospective analysis of 42 adult patients with testicular cancers was carried out.Results: Ultrasonography (B-ultrasound and color Doppler flow imaging) was performed on 37 cases. One case was misdiagnosed. Surgical management was carried out in 42 cases and postoperational radiation therapy or chemotherapy was performed. The 1–5 year postoperative survival rate was totally 100%.Conclusion: B-ultrasound, especially color Doppler flow imaging, with the advantages of noninvasiveness and inexpensiveness was most useful and should be firstly employed in diagnosing the testicular tumor. The favorable prognosis can be obtained if an early diagnosis is made and the early treatment is performed. Key words testicular tumor - B-ultrasound - color Doppler flow imaging
文摘Cholangiocarcinoma is a rare malignancy of the biliary tract. Key factors in determining therapeutic options include knowledge of tumor extent, anatomy and obtaining tissue diagnosis. Endoscopically, there are three modalities available to make the diagnosis of cholangiocarcinoma. These include endoscopic retrograde cholangiopancreatography, endoscopic ultrasound with fine needle aspiration and cholangioscopy. Management of cholangiocarcinoma endoscopically is typically confined to stent placement for palliative purposes or as a bridge to surgery. In this article, we will review the endoscopic techniques available for the diagnosis and management of cholangiocarcinoma.
文摘EUS is the most sensitive imaging procedure for the detection of small solid pancreatic masses and is accurate in determining vascular invasion of the portal venous system. Even compared to the new CT-techniques EUS provides excellent results in preoperative staging of solid pancreatic tumors. Compared to helical CT-techniques EUS is less accurate in detecting tumor involvement of superior mesenteric artery. EUS staging and EUS-guided FNA can be performed in a single-step procedure, to establish the diagnosis of cancer. There is no known negative impact of tumor cell seeding due to EUS-FNA. Without FNA EUS and additional methods are not able to reliably distinguish between inflammatory and malignant masses.
文摘Color Doppler flow imaging(CDFI) was performed in 24 patients with Graves' disease and the results were compared with those from 8 patients with Hashimoto's disease, 6 patients with simple diffuse goiter, and 15 normal volunteers. All cases were confirmed by clinical, laboratory tests or pathology. CDFI of Graves' disease showed diffuse or localized hypoechoes within the thyroid glands, rich flow signals in the hypoechoes, accelerated flow velocity, and decreased resistance in the superior thyroid arteries(STA) and arteries within the glands. These appearances were characteristic as compared with the controls. The rate of flow in STA of Graves' disease patients was 8 to 10 times higher than that in the normal volunteers. This study demonstrates that CDFI is convenient and efficient as compared with isotope scan and some other laboratory tests, and can be widely used in the diagnosis of Graves' disase.
文摘The purpose of this study was to determine the efficacy of using an ultrasound contrast agent(levovist)to enhance the color Doppler imaging of liver neoplasms.Thirty patients with hepatic tumors were enrolled in this study.After intravenous administration of levovist,the color Doppler signals of normal hepatic vessels were enhanced.In various hepatic tumors,the different patterns of tumor vascularity were observed,which had not been demonstrated in conventional non contrast color Doppler imaging.In 11 of 16 patients with hepatocarcinoma,additional color Doppler signals were observed in the central part of the tumors.On the contrary,3 patients with metastatic liver lesions the enhanced color Doppler signals appear only at the peripheral of tumors.A typical rim like color enhancement was seen in 2 of the 3 cases.In six patients with hepatic hemangiomas contrast enhanced color Doppler imaging demonstrated the blood vessels at the margin of the neoplasms.Contrast enhanced color Doppler imaging improves the visualization of the hepatic neoplasm vascularity.This technique holds great promise for detecting small liver tumors and differentiating hepatic neoplasms.
文摘Objective:To compare the reliability of transvaginal ultrasonography with pelvic arteriography in the assessment of patients with gestational trophoblastic disease. Methods. Transvaginal ultrasonography was performed in 24 patients with gestational trophoblastic tumour. Within one week after ultrasound investigation, pelvic arteriography was carried out in each patient. Of 24 cases, 16 patients hadn’t been treated by chemical reagent, 5 had accepted 2 to 5 courses of chemotherapy, and 3 had achieved complete remission before both investigations performed. Results. In 3 patients with complete remission, 2 had no evidence of abnormal findings either on transvaginal ultrasonography or on pelvic arteriography, 1 showed intramyometrial lesions by both methods. In the remaining 21 patients, all demostrated a abnormal uterine image, and 5 of them accompanied with the finding of parametrium metastatic signs by transvaginal ultrasonography; these abnormal results were confirmed by pelvic arteriographic imaging. However, in two cases without clinical and ultrasonic signs of parametrium metastasis, pelvic arteriography indicated the early metastasis of parametrium ves- sels. Conclusions. Even though it is difficult to predict the early parametrium metastasis in patients with gestational trophoblastic disease by B-ultrasonic investigation, our data would support the introduction of transvaginal ultrasonography in the diagnosis and evaluation of gestational trophoblastic tumour.
文摘AIM:To study the role of time-intensity curve(TIC) analysis parameters in a complex system of neural networks designed to classify liver tumors.METHODS:We prospectively included 112 patients with hepatocellular carcinoma(HCC)(n = 41),hypervascular(n = 20) and hypovascular(n = 12) liver metastases,hepatic hemangiomas(n = 16) or focal fatty changes(n = 23) who underwent contrast-enhanced ultrasonography in the Research Center of Gastroenterology and Hepatology,Craiova,Romania.We recorded full length movies of all contrast uptake phases and post-processed them offline by selecting two areas of interest(one for the tumor and one for the healthy surrounding parenchyma) and consecutive TIC analysis.The difference in maximum intensities,the time to reaching them and the aspect of the late/portal phase,as quantified by the neural network and a ratio between median intensities of the central and peripheral areas were analyzed by a feed forward back propagation multi-layer neural network which was trained to classify data into five distinct classes,corresponding to each type of liver lesion.RESULTS:The neural network had 94.45% training accuracy(95% CI:89.31%-97.21%) and 87.12% testing accuracy(95% CI:86.83%-93.17%).The automatic classification process registered 93.2% sensitivity,89.7% specificity,94.42% positive predictive value and 87.57% negative predictive value.The artificial neural networks(ANN) incorrectly classified as hemangyomas three HCC cases and two hypervascular metastases,while in turn misclassifying four liver hemangyomas as HCC(one case) and hypervascular metastases(three cases).Comparatively,human interpretation of TICs showed 94.1% sensitivity,90.7% specificity,95.11% positive predictive value and 88.89% negative predictive value.The accuracy and specificity of the ANN diagnosis system was similar to that of human interpretation of the TICs(P = 0.225 and P = 0.451,respectively).Hepatocellular carcinoma cases showed contrast uptake during the arterial phase followed by wash-out in the portal and first seconds of the late phases.For the hypovascular metastases did not show significant contrast uptake during the arterial phase,which resulted in negative differences between the maximum intensities.We registered wash-out in the late phase for most of the hypervascular metastases.Liver hemangiomas had contrast uptake in the arterial phase without agent wash-out in the portallate phases.The focal fatty changes did not show any differences from surrounding liver parenchyma,resulting in similar TIC patterns and extracted parameters.CONCLUSION:Neural network analysis of contrastenhanced ultrasonography-obtained TICs seems a promising field of development for future techniques,providing fast and reliable diagnostic aid for the clinician.
文摘Myelolipoma of the extra-adrenal gland is a rare,benign tumor comprising mature fat tissue and hematopoietic elements.Most myelolipomas are asymptomic and discovered incidentally.We presented a 44-year-old male who was admitted to our hospital for right kidney dystrophy and renal calculus.Ultrasound examination of right kidneys showed hydronephrosis.Intravenous pyelography showed the right renal contour was unclear,with a circular high-density shadow inside.The nephrectomy was performed with renal myelolipoma as a final pathologic diagnosis.
文摘Diagnosis of hepatocellular carcinoma (HCC), a common digestive malignancy, remains a challenge. The aim of this study was to evaluate the feasibility of performing laparoscopy and laparoscopic ultrasound with local anesthesia as a diagnostic procedure in HCC. Laparoscopy and laparoscopic ultrasound with local anesthesia was performed in the gastrointestinal endoscopy unit in three patients diagnosed of HCC. Endoscopy staged diffuse liver disease. Laparoscopic ultrasonography identified all liver tumors not visible during endoscopy and guided needle biopsy in one case. No complications happened. In conclusion, laparoscopy and laparoscopic ultrasound,performed as a minimally invasive diagnostic procedure can be a safe and very promising tool in planning therapy of HCC.
文摘Endoscopic ultrasonography is an established diagnostic tool for pancreatic masses and chronic pancreatitis.In recent years there has been a growing interest in the worldwide medical community in autoimmune pancreatitis (AIP),a form of chronic pancreatitis caused by an autoimmune process.This paper reviews the current available literature about the endoscopic ultrasonographic findings of AIP and the role of this imaging technique in the management of this protean disease.
文摘Objective. To evaluate the diagnostic criteria for the localization of acquired arteriovenous fistulas (AVFs) by color Doppler flow imaging (CDFI) based on the features of their hemodynamic changes. Methods. The shape and hemodynamic changes of involved vessels which could be helpful to localize the sites of fistulas were studied according to the observation of 10 cases of acquired AVFs. Results. The sites of the fistulas could be shown by two dimensional ultrasonography and color flow imaging in 40%and 80%cases, respectively. In all cases, turbulent high velocity flow was present at the sites of the fistulas, low resistant flow was present in the arteries proximal to the fistulas, and artery like flow was detected in the veins. Conclusion. CDFI was accurate for the localization of acquired AVFs, which were mainly localized by their hemodynamic changes shown by pulse Doppler ultrasound.
文摘Objective.The purpose of this study was to determine the impact of intraoperative ultrasound(IOUS)on the management of patients with neoplasms of the liver. Methods.Forty nine patients operated on for liver or other pathologic processes were examined intraoperatively with 5.0 MHz special ultrasound transducers during surgical exploration of the abdomen.Subjects were evaluated because of known or suspected disease of the liver.Preoperative imaging studies included percutaneous ultrasound(n=49),magnetic resonance imaging(n=11),and computed tomography(n=34).Intraoperative evaluation on all patients included inspection,bimanual palpation,and ultrasonography.Comparison between preoperative imagings and IOUS were analysed. Results.Sensitivity for detection of hepatic neoplasms showed in intraoperative ultrasound,percutaneous ultrasound,magnetic resonance imaging and computed tomography as 100%(23/23),74%(17/23),74%(14/19) and 75%(6/8).Specificity showed 100%(26/26),100%(26/26),93%(14/15) and 67(2/3).In seven patients(14%),the neoplasms were not found by inspection,bimanual palpation,and identified only by IOUS. Conclusions.Intraoperative ultrasound is the most sensitive and specific method for detection and surgery of liver neoplasms,especially the occult neoplasms and small size lesion(<2cm).
文摘Objective: The aim of the study was to discuss the value of ultrasound examination in the diagnosis of fetal gastric teratoma. Methods: We retrospectively analyzed 2 cases with fetal gastric teratoma in our hospital (Department of Gynecology and Obstetrics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China). It involved clinical, ultrasonic, X-ray, CT and MRI, biochemical, pathological, karyotype and immunohistochemical data. Results: There both were hybrid echo masses in the abdominal of the fetus with the sonography and the ultrasound features which mostly like the teratomas. Two cases were dead after induced abortion. The pathological results of the mass were gastric immature teratoma in one, and stomach mature teratoma in another. Conclusion: Fetal gastric teratoma is rarely seen and easily be misdiagnosed in clinic. The diagnosis depends finally on pathological examination. Ultrasound scan as the easy and direct method is helpful to clew the diagnosis of fetal gastric teratoma.
