Two patients with tuberculous abscess in the hepatoduodenal ligament were studied. Both patients underwent contrast-enhanced computed tomography (CT) scan. The abscess showed a low density with an irregular thick wall...Two patients with tuberculous abscess in the hepatoduodenal ligament were studied. Both patients underwent contrast-enhanced computed tomography (CT) scan. The abscess showed a low density with an irregular thick wall in the hepatoduodenal ligament on CT images, the margin was poorly defined. Contrastenhanced CT images showed the contrast-enhanced thick wall, homogeneous and peripheral-enhanced lymph nodes. Although features of the tuberculous abscess in the hepatoduodenal ligament could be conspicuously shown with contrast-enhanced CT, further experience is needed to evaluate the potential value of CT in detecting early tuberculous abscess in relation to other entities in the hepatoduodenal ligament.展开更多
AIM:To analyze the clinical and imaging features of the small intestinal lipomas and to evaluate the diagnostic value of multi-slice computed tomography(CT) enterography.METHODS:Fourteen cases(one had two intestinal l...AIM:To analyze the clinical and imaging features of the small intestinal lipomas and to evaluate the diagnostic value of multi-slice computed tomography(CT) enterography.METHODS:Fourteen cases(one had two intestinal lesions) of surgically confirmed lipomas of the small intestine were retrospectively analyzed.The location,size,clinical and radiological aspects were discussed.RESULTS:Twelve patients presented with abdominal pain,of whom three complained of paroxysmal colic.Melena or bloody stools was mentioned in five cases.One lesion was detected incidentally during routine physical examination.One lesion was found unexpectedly during the preoperational evaluation for cholecystitis.Examination of the abdomen revealed palpable masses in four cases.Precontrast CT scan showed round or oval well-defined hypo-intense intraluminal masses with the attenuation ranging from-130 HU to-60 HU.On contrast enhancement CT scan,no striking enhancement was seen.CONCLUSION:The small intestinal lipomas are rare and difficult to diagnose merely based on clinical manifestations,while the characteristic features at small intestinal CT enterography can help establish reliable prospective diagnoses.展开更多
Hepatocellular carcinoma (HCC) is one of the most frequent malignancies in the world. It is more common in far eastern countries and relatively rare in the United States and western European countries where at autopsy...Hepatocellular carcinoma (HCC) is one of the most frequent malignancies in the world. It is more common in far eastern countries and relatively rare in the United States and western European countries where at autopsy it accounts for only 1-2% of malignant rumors, The disease is usually manifested in the the 6^th and 7^th decade of life. HCC is one of the highly malignant neoplasms, Extrahepatic metastases are seen in 64% of patients with HCC. The lungs, regional lymph nodes, kidney, bone marrow and adrenals are common sites of HCC metastasis^[1-3], But, metastasis to brain and skull is extremely rare. Table I shows some of the reported cases of HCC with brain metastasis. These case reports reaffirms the complex and multidisciplinary care of these patients^[4-5].展开更多
Objective： To study the perfusion CT features of rabbit VX2 brain tumor with correlation to MVD and VEGF, and to validate perfusion CT for reflection of tumor angiogenesis. Methods： Rabbit VX2 brain tumor model was ...Objective： To study the perfusion CT features of rabbit VX2 brain tumor with correlation to MVD and VEGF, and to validate perfusion CT for reflection of tumor angiogenesis. Methods： Rabbit VX2 brain tumor model was established by injection of 100 μL viable tumor cells （10qmL） through a 2 mm-hole 5 mm to the right of the sagittal suture and 5 mm posterior to the coronal suture bored by dental drill. MRI was performed every 2 days after seven days of implantation to evaluate the growth of the tumor. Twenty New Zealand White rabbits with tumor size over 3 mm in diameter were randomly divided into 2 groups according to the tumor growth time with those less than 3 weeks as group 1 and those more than 3 weeks as group 2, and perfusion CT were performed accordingly. CT measurements of BV, BF and PS from tumor, peritumor and contralateral normal tissue regions were obtained. After that the animals were sacrificed and 2% Evans blue （2 mL/kg） was given intravenously in 16 of these animals 1 h prior to sacrifice to detect breakdown of the blood brain barrier. VEGF and MVD were evaluated in immunohistochemical examination of the specimens. Results： Tumor had significantly higher BV, BF and PS （P=0.000） than peritumor and normal tissue region. Tumor BV, BF and MVD in group 2 were significantly higher than that in group 1 （P〈0.01）. Significant linear correlation was found between MVD and BV （t=-0.915, P=-0.000）, MVD and BF （t=0.901, P=-0.000）, and MVD and PS （t=-0.459, P=0.042）. We also found a rank correlation between PS and blue stain of tumor （rs=0.861, P=0.000）. Conclusion： Perfusion CT can distinguish tumor from peritumor and normal tissue clearly, reflect tumor angiogenesis accurately, and provide useful information for the evaluation of brain tumor.展开更多
Objective: To investigate the features of hepatic abscess by dynamic contrast-enhanced CT. Methods : CT films of 62 cases of hepatic abscesses were reviewed retrospectively. All the patients underwent both plain and e...Objective: To investigate the features of hepatic abscess by dynamic contrast-enhanced CT. Methods : CT films of 62 cases of hepatic abscesses were reviewed retrospectively. All the patients underwent both plain and enhanced CT scanning, and 23 of them received dynamic CT examination. Results: The dynamic CT appearance of hepatic abscesses was characterized by: ① In the early phase (30 s), abscess membrane enhanced obviously and the liver parenchyma surrounding the abscesses enhanced transiently; ② In the late phase (60-90 s) , the enhancement patterns of the abscesses varied from the ring enhancement of the abscess membrane to the irregular enhancement of the abscess; ③ In the delayed phase, the enhancement of abscess diminished in which the hypodense ring enhanced and became isodense, or the abscess enhanced diffusely and became smaller, the colliquative necrosis area more obvious. Conclusion: Contrast enhanced CT should be used routinely in the evaluation of hepatic abscesses. The dynamic and delayed scan is necessary to diagnose atypical hepatic abscesses.展开更多
文摘Two patients with tuberculous abscess in the hepatoduodenal ligament were studied. Both patients underwent contrast-enhanced computed tomography (CT) scan. The abscess showed a low density with an irregular thick wall in the hepatoduodenal ligament on CT images, the margin was poorly defined. Contrastenhanced CT images showed the contrast-enhanced thick wall, homogeneous and peripheral-enhanced lymph nodes. Although features of the tuberculous abscess in the hepatoduodenal ligament could be conspicuously shown with contrast-enhanced CT, further experience is needed to evaluate the potential value of CT in detecting early tuberculous abscess in relation to other entities in the hepatoduodenal ligament.
文摘AIM:To analyze the clinical and imaging features of the small intestinal lipomas and to evaluate the diagnostic value of multi-slice computed tomography(CT) enterography.METHODS:Fourteen cases(one had two intestinal lesions) of surgically confirmed lipomas of the small intestine were retrospectively analyzed.The location,size,clinical and radiological aspects were discussed.RESULTS:Twelve patients presented with abdominal pain,of whom three complained of paroxysmal colic.Melena or bloody stools was mentioned in five cases.One lesion was detected incidentally during routine physical examination.One lesion was found unexpectedly during the preoperational evaluation for cholecystitis.Examination of the abdomen revealed palpable masses in four cases.Precontrast CT scan showed round or oval well-defined hypo-intense intraluminal masses with the attenuation ranging from-130 HU to-60 HU.On contrast enhancement CT scan,no striking enhancement was seen.CONCLUSION:The small intestinal lipomas are rare and difficult to diagnose merely based on clinical manifestations,while the characteristic features at small intestinal CT enterography can help establish reliable prospective diagnoses.
文摘Hepatocellular carcinoma (HCC) is one of the most frequent malignancies in the world. It is more common in far eastern countries and relatively rare in the United States and western European countries where at autopsy it accounts for only 1-2% of malignant rumors, The disease is usually manifested in the the 6^th and 7^th decade of life. HCC is one of the highly malignant neoplasms, Extrahepatic metastases are seen in 64% of patients with HCC. The lungs, regional lymph nodes, kidney, bone marrow and adrenals are common sites of HCC metastasis^[1-3], But, metastasis to brain and skull is extremely rare. Table I shows some of the reported cases of HCC with brain metastasis. These case reports reaffirms the complex and multidisciplinary care of these patients^[4-5].
文摘Objective： To study the perfusion CT features of rabbit VX2 brain tumor with correlation to MVD and VEGF, and to validate perfusion CT for reflection of tumor angiogenesis. Methods： Rabbit VX2 brain tumor model was established by injection of 100 μL viable tumor cells （10qmL） through a 2 mm-hole 5 mm to the right of the sagittal suture and 5 mm posterior to the coronal suture bored by dental drill. MRI was performed every 2 days after seven days of implantation to evaluate the growth of the tumor. Twenty New Zealand White rabbits with tumor size over 3 mm in diameter were randomly divided into 2 groups according to the tumor growth time with those less than 3 weeks as group 1 and those more than 3 weeks as group 2, and perfusion CT were performed accordingly. CT measurements of BV, BF and PS from tumor, peritumor and contralateral normal tissue regions were obtained. After that the animals were sacrificed and 2% Evans blue （2 mL/kg） was given intravenously in 16 of these animals 1 h prior to sacrifice to detect breakdown of the blood brain barrier. VEGF and MVD were evaluated in immunohistochemical examination of the specimens. Results： Tumor had significantly higher BV, BF and PS （P=0.000） than peritumor and normal tissue region. Tumor BV, BF and MVD in group 2 were significantly higher than that in group 1 （P〈0.01）. Significant linear correlation was found between MVD and BV （t=-0.915, P=-0.000）, MVD and BF （t=0.901, P=-0.000）, and MVD and PS （t=-0.459, P=0.042）. We also found a rank correlation between PS and blue stain of tumor （rs=0.861, P=0.000）. Conclusion： Perfusion CT can distinguish tumor from peritumor and normal tissue clearly, reflect tumor angiogenesis accurately, and provide useful information for the evaluation of brain tumor.
文摘Objective: To investigate the features of hepatic abscess by dynamic contrast-enhanced CT. Methods : CT films of 62 cases of hepatic abscesses were reviewed retrospectively. All the patients underwent both plain and enhanced CT scanning, and 23 of them received dynamic CT examination. Results: The dynamic CT appearance of hepatic abscesses was characterized by: ① In the early phase (30 s), abscess membrane enhanced obviously and the liver parenchyma surrounding the abscesses enhanced transiently; ② In the late phase (60-90 s) , the enhancement patterns of the abscesses varied from the ring enhancement of the abscess membrane to the irregular enhancement of the abscess; ③ In the delayed phase, the enhancement of abscess diminished in which the hypodense ring enhanced and became isodense, or the abscess enhanced diffusely and became smaller, the colliquative necrosis area more obvious. Conclusion: Contrast enhanced CT should be used routinely in the evaluation of hepatic abscesses. The dynamic and delayed scan is necessary to diagnose atypical hepatic abscesses.
