Perivascular epithelioid cell tumor (PEComa) is a rare tumor which arises from mesenchymal tissues. It is predominant in the uterus,but very rare in the liver. To the best of our knowledge,less than 5 cases of PEComa ...Perivascular epithelioid cell tumor (PEComa) is a rare tumor which arises from mesenchymal tissues. It is predominant in the uterus,but very rare in the liver. To the best of our knowledge,less than 5 cases of PEComa of the liver have been reported. Herein we present two pathologically proven cases of PEComa of the liver,retrospectively analyze their clinical and imaging features,and review the literature.展开更多
We report a case of a 61-year-old man who presented with fatigue,abdominal pain and hepatomegaly.Computed tomography (CT) of the abdomen showed hepatomegaly and multiple hepatic lesions highly suggestive of metastatic...We report a case of a 61-year-old man who presented with fatigue,abdominal pain and hepatomegaly.Computed tomography (CT) of the abdomen showed hepatomegaly and multiple hepatic lesions highly suggestive of metastatic diseases.Due to the endoscopic finding of colon ulcer,colon cancer with liver metastases was suspected.Biochemically a slight increase of transaminases,alkaline phosphatase and gammaglutamyl transpeptidase were present;α- fetoprotein,carcinoembryogenic antigen and carbohydrate 19-9 antigen serum levels were normal.Laboratory and instrumental investigations,including colon and liver biopsies revealed no signs of malignancy.In the light of spontaneous improvement of symptoms and CT findings,his personal history was revaluated revealing direct contact with pigs and their tissues.Diagnosis of leptospirosis was considered and confirmed by detection of an elevated titer of antibodies to leptospira.After two mo,biochemical data,CT and colonoscopy were totally normal.展开更多
During the first wave of the pandemic,coronavirus disease 2019(COVID-19)infection has been considered mainly as a pulmonary infection.However,different clinical and radiological manifestations were observed over time,...During the first wave of the pandemic,coronavirus disease 2019(COVID-19)infection has been considered mainly as a pulmonary infection.However,different clinical and radiological manifestations were observed over time,including involvement of abdominal organs.Nowadays,the liver is considered one of the main affected abdominal organs.Hepatic involvement may be caused by either a direct damage by the virus or an indirect damage related to COVID-19 induced thrombosis or to the use of different drugs.After clinical assessment,radiology plays a key role in the evaluation of liver involvement.Ultrasonography(US),computed tomography(CT)and magnetic resonance imaging(MRI)may be used to evaluate liver involvement.US is widely available and it is considered the first-line technique to assess liver involvement in COVID-19 infection,in particular liver steatosis and portal-vein thrombosis.CT and MRI are used as second-and third-line techniques,respectively,considering their higher sensitivity and specificity compared to US for assessment of both parenchyma and vascularization.This review aims to the spectrum of COVID-19 liver involvement and the most common imaging features of COVID-19 liver damage.展开更多
Background:Patients with mass-forming pancreatitis(MFP)or pancreatic ductal adenocarcinoma(PDAC)presented similar clinical symptoms,but required different treatment approaches and had different survival outcomes.This ...Background:Patients with mass-forming pancreatitis(MFP)or pancreatic ductal adenocarcinoma(PDAC)presented similar clinical symptoms,but required different treatment approaches and had different survival outcomes.This meta-analysis aimed to compare the diagnostic performance of contrast-enhanced ultrasound(CEUS)and contrast-enhanced computed tomography(CECT)in differentiating MFP from PDAC.Methods:A literature search was performed in the PubMed,EMBASE(Ovid),Cochrane Library(CENTRAL),China National Knowledge Infrastructure(CNKI),Weipu(VIP),and WanFang databases to identify original studies published from inception to August 20,2021.Studies reporting the diagnostic performances of CEUS and CECT for differentiating MFP from PDAC were included.The meta-analysis was performed with Stata 15.0 software.The outcomes included the pooled sensitivity,specificity,positive likelihood ratio(+LR),negative likelihood ratio(-LR),diagnostic odds ratio(DOR),and summary receiver operating characteristic(SROC)curves of CEUS and CECT.Meta-regression was conducted to investigate heterogeneity.Bayesian network meta-analysis was conducted to indirectly compare the overall diagnostic performance.Results:Twenty-six studies with 2115 pancreatic masses were included.The pooled sensitivity and specificity of CEUS for MFP were 82%(95%confidence interval[CI],73%-88%;I^(2)=0.00%)and 95%(95%CI,90%-97%;I^(2)=63.44%),respectively;the overall+LR,-LR,and DOR values were 15.12(95%CI,7.61-30.01),0.19(95%CI,0.13-0.29),and 78.91(95%CI,30.94-201.27),respectively;and the area under the SROC curve(AUC)was 0.90(95%CI,0.87-92).However,the overall sensitivity and specificity of CECT were 81%(95%CI,75-85%;I^(2)=66.37%)and 94%(95%CI,90-96%;I^(2)=74.87%);the overall+LR,-LR,and DOR values were 12.91(95%CI,7.86-21.20),0.21(95%CI,0.16-0.27),and 62.53(95%CI,34.45-113.51),respectively;and,the SROC AUC was 0.92(95%CI,0.90-0.94).The overall diagnostic accuracy of CEUS was comparable to that of CECT for the differential diagnosis of MFP and PDAC(relative DOR 1.26,95%CI[0.42-3.83],P>0.05).Conclusions:CEUS and CECT have comparable diagnostic performance for differentiating MFP from PDAC,and should be considered as mutually complementary diagnostic tools for suspected focal pancreatic lesions.展开更多
目的:对兔肝VX2肿瘤进行高强度聚焦超声(HIFU)联合超声造影剂微泡SonoVue消融治疗,运用超声造影(CEUS)和增强螺旋CT(CECT)对比病理结果研究检测残瘤的能力。方法:将40只兔肝VX2肿瘤动物模型随机分为假照组(n=10)、单纯HIFU组(n=15)和HIF...目的:对兔肝VX2肿瘤进行高强度聚焦超声(HIFU)联合超声造影剂微泡SonoVue消融治疗,运用超声造影(CEUS)和增强螺旋CT(CECT)对比病理结果研究检测残瘤的能力。方法:将40只兔肝VX2肿瘤动物模型随机分为假照组(n=10)、单纯HIFU组(n=15)和HIFU联合微泡组(n=15),在消融前后3 h内完成CEUS和CECT检查,分析肿瘤血供变化及残瘤的检测情况,然后即刻处死,对肿瘤的消融情况及有无残瘤行病理学检查并结合影像学结果对比分析。结果:40灶兔肝VX2肿瘤在消融前CEUS和CECT分别表现为动脉相整体增强(77.5%,31/40 vs 52.5%,21/40)和厚环状增强(22.5%,9/40 vs 47.5%,19/40),均为动脉相富血供,门脉相迅速消退,呈"快进快出"。HIFU联合微泡组的平均辐照时间、辐照点数及电功率均较单纯HIFU组为低(P<0.01)。消融后,假照组影像学无明显变化,病理组织学显示肿瘤内丰富的微血管形成;单纯HIFU组和HIFU联合微泡组中分别有60.0%(9/15)和13.3%(2/15)残瘤存在。CEUS对这两组的残瘤检出率高于CECT,CEUS和CECT检测残瘤同病理诊断的一致率分别为81.8%和27.3%,两者比较差异有统计学意义(P<0.05)。结论:HIFU联合微泡可以提高兔肝VX2肿瘤的消融效果,减少残瘤发生率,CEUS检测残瘤的能力优于CECT。展开更多
文摘Perivascular epithelioid cell tumor (PEComa) is a rare tumor which arises from mesenchymal tissues. It is predominant in the uterus,but very rare in the liver. To the best of our knowledge,less than 5 cases of PEComa of the liver have been reported. Herein we present two pathologically proven cases of PEComa of the liver,retrospectively analyze their clinical and imaging features,and review the literature.
文摘We report a case of a 61-year-old man who presented with fatigue,abdominal pain and hepatomegaly.Computed tomography (CT) of the abdomen showed hepatomegaly and multiple hepatic lesions highly suggestive of metastatic diseases.Due to the endoscopic finding of colon ulcer,colon cancer with liver metastases was suspected.Biochemically a slight increase of transaminases,alkaline phosphatase and gammaglutamyl transpeptidase were present;α- fetoprotein,carcinoembryogenic antigen and carbohydrate 19-9 antigen serum levels were normal.Laboratory and instrumental investigations,including colon and liver biopsies revealed no signs of malignancy.In the light of spontaneous improvement of symptoms and CT findings,his personal history was revaluated revealing direct contact with pigs and their tissues.Diagnosis of leptospirosis was considered and confirmed by detection of an elevated titer of antibodies to leptospira.After two mo,biochemical data,CT and colonoscopy were totally normal.
文摘During the first wave of the pandemic,coronavirus disease 2019(COVID-19)infection has been considered mainly as a pulmonary infection.However,different clinical and radiological manifestations were observed over time,including involvement of abdominal organs.Nowadays,the liver is considered one of the main affected abdominal organs.Hepatic involvement may be caused by either a direct damage by the virus or an indirect damage related to COVID-19 induced thrombosis or to the use of different drugs.After clinical assessment,radiology plays a key role in the evaluation of liver involvement.Ultrasonography(US),computed tomography(CT)and magnetic resonance imaging(MRI)may be used to evaluate liver involvement.US is widely available and it is considered the first-line technique to assess liver involvement in COVID-19 infection,in particular liver steatosis and portal-vein thrombosis.CT and MRI are used as second-and third-line techniques,respectively,considering their higher sensitivity and specificity compared to US for assessment of both parenchyma and vascularization.This review aims to the spectrum of COVID-19 liver involvement and the most common imaging features of COVID-19 liver damage.
基金Science and Technology Department of Sichuan Province(No.2018FZ0044)National Natural Science Foundation of China(No.81571697)
文摘Background:Patients with mass-forming pancreatitis(MFP)or pancreatic ductal adenocarcinoma(PDAC)presented similar clinical symptoms,but required different treatment approaches and had different survival outcomes.This meta-analysis aimed to compare the diagnostic performance of contrast-enhanced ultrasound(CEUS)and contrast-enhanced computed tomography(CECT)in differentiating MFP from PDAC.Methods:A literature search was performed in the PubMed,EMBASE(Ovid),Cochrane Library(CENTRAL),China National Knowledge Infrastructure(CNKI),Weipu(VIP),and WanFang databases to identify original studies published from inception to August 20,2021.Studies reporting the diagnostic performances of CEUS and CECT for differentiating MFP from PDAC were included.The meta-analysis was performed with Stata 15.0 software.The outcomes included the pooled sensitivity,specificity,positive likelihood ratio(+LR),negative likelihood ratio(-LR),diagnostic odds ratio(DOR),and summary receiver operating characteristic(SROC)curves of CEUS and CECT.Meta-regression was conducted to investigate heterogeneity.Bayesian network meta-analysis was conducted to indirectly compare the overall diagnostic performance.Results:Twenty-six studies with 2115 pancreatic masses were included.The pooled sensitivity and specificity of CEUS for MFP were 82%(95%confidence interval[CI],73%-88%;I^(2)=0.00%)and 95%(95%CI,90%-97%;I^(2)=63.44%),respectively;the overall+LR,-LR,and DOR values were 15.12(95%CI,7.61-30.01),0.19(95%CI,0.13-0.29),and 78.91(95%CI,30.94-201.27),respectively;and the area under the SROC curve(AUC)was 0.90(95%CI,0.87-92).However,the overall sensitivity and specificity of CECT were 81%(95%CI,75-85%;I^(2)=66.37%)and 94%(95%CI,90-96%;I^(2)=74.87%);the overall+LR,-LR,and DOR values were 12.91(95%CI,7.86-21.20),0.21(95%CI,0.16-0.27),and 62.53(95%CI,34.45-113.51),respectively;and,the SROC AUC was 0.92(95%CI,0.90-0.94).The overall diagnostic accuracy of CEUS was comparable to that of CECT for the differential diagnosis of MFP and PDAC(relative DOR 1.26,95%CI[0.42-3.83],P>0.05).Conclusions:CEUS and CECT have comparable diagnostic performance for differentiating MFP from PDAC,and should be considered as mutually complementary diagnostic tools for suspected focal pancreatic lesions.
文摘目的:对兔肝VX2肿瘤进行高强度聚焦超声(HIFU)联合超声造影剂微泡SonoVue消融治疗,运用超声造影(CEUS)和增强螺旋CT(CECT)对比病理结果研究检测残瘤的能力。方法:将40只兔肝VX2肿瘤动物模型随机分为假照组(n=10)、单纯HIFU组(n=15)和HIFU联合微泡组(n=15),在消融前后3 h内完成CEUS和CECT检查,分析肿瘤血供变化及残瘤的检测情况,然后即刻处死,对肿瘤的消融情况及有无残瘤行病理学检查并结合影像学结果对比分析。结果:40灶兔肝VX2肿瘤在消融前CEUS和CECT分别表现为动脉相整体增强(77.5%,31/40 vs 52.5%,21/40)和厚环状增强(22.5%,9/40 vs 47.5%,19/40),均为动脉相富血供,门脉相迅速消退,呈"快进快出"。HIFU联合微泡组的平均辐照时间、辐照点数及电功率均较单纯HIFU组为低(P<0.01)。消融后,假照组影像学无明显变化,病理组织学显示肿瘤内丰富的微血管形成;单纯HIFU组和HIFU联合微泡组中分别有60.0%(9/15)和13.3%(2/15)残瘤存在。CEUS对这两组的残瘤检出率高于CECT,CEUS和CECT检测残瘤同病理诊断的一致率分别为81.8%和27.3%,两者比较差异有统计学意义(P<0.05)。结论:HIFU联合微泡可以提高兔肝VX2肿瘤的消融效果,减少残瘤发生率,CEUS检测残瘤的能力优于CECT。
