ABSTRACT
Objective To investigate the CT characteristics of retroperitoneal extra-adrenal paraganglioma(PGL).Methods CT findings of 11 patients with pathologically confirmed retroperitoneal extra-adrenal PGL were analyzed retrospectively,and the relevant literature was reviewed.All patients received plain CT as well as contrast-enhancement CT scan.Results All of the 11 tumors were located in the retroperitoneal space around large blood vessels,including 2 functional and 9 unfunctional extra-adrenal paragangliomas.Eight of 11 cases were benign tumors which presented as round or oval masses with sharp margins,separated from surrounding structures clearly;while the rest 3 cases,which with indistinct edge,even more with the invasion of surrounding structures (renal artery,renal venous and pancreas),were confirmed to be malignant.Most of the tumors were heterogeneous on plain CT.It was common to see intratumoral necrosis or cystic degeneration in the tumors (9 cases),while hemorrhage or calcification was uncommon,which was found in 3 and 2 cases,respectively.Homogeneous intensity was only observed in 2 masses with diameter less than 4 cm.On contrast-enhanced CT image, the solid part of the tumors presented continuously significant enhancement.Dilated feeding artery was found in or around the masses (8 cases) in artery phase.Conclusion There are certain characteristics of retroperitoneal extra-adrenal paraganglioma on CT scanning, which are helpful for preoperative diagnosis and treatment of this disease.
ABSTRACT
Objective To investigate the correlation between serum HCY (Homocysteine) and carotid artery stenosis,plaque stability in patients with ischemic cerebrovascular disease.Methods 154 patients with ischemic cerebrovascular disease in Tangdu Hospital were enrolled in the study from June to December 2016.The serum levels of HCY were detected.CT angiography (CTA) was uesd for patients with neck vascular scanning.According to the difference of serum HCY level,patients were divided into 80 cases of high HCY group (observation group) and 74 cases of normal HCY group (control group).The degree of carotid artery stenosis,number and stability of plaque were compared between the two groups and the correlation between serum HCY level and degree of carotid artery stenosis and plaque stability were analyzed.Results The total stenosis rate in the observation group was significantly higher than that in the control group,the moderate stenosis rate and severe stenosis rate in the observation group were significantly higher than those in the control group,with the statistically significant differences (x2 =5.594～ 22.506,all P＜0.05).The levels of serum HCY in mild,moderate and severe stenosis group were 13.16 ± 6.73,15.19± 5.93 and 26.13 ±11.18 μmol/L respectively.The levels of H CY in moderate stenosis group and severe stenosis group were significantly higher than that in mild stenosis group,and the levels of HCY in severe stenosis group was significantly higher than that in moderate stenosis group,with the statistically significant differences (t=2.684～ 5.270,all P＜0.01).The rate of carotid plaque in the observation group was significantly higher than that in the control group,and the differences statistically significant (x2 =25.053,P＜0.01).The rate of unstable plaque and mixed plaque in the observation group was significantly higher than that in the control group,and the rate of stable plaque was significantly lower than that in the control group (x2 =4.067～ 14.95,all P＜0.05).The levels of serum HCY in stable plaque group,mixed plaque group and unstable plaque group were 16.14±5.49,21.91 ± 6.32 and 26.74 ± 10.59 μmol/L respectively.The levels of HCY in mixed plaque group and unstable plaque group were significantly higher than that in stable plaque group,and the differences were statistically significant (t=4.370,4.628,all P＜0.01).The level of HCY in unstable plaque group was significantly higher than that in mixed plaque group,and the difference was statistically significant (t =2.249,P＜ 0.05).Conclusion Serum HCY levels were closely related to carotid artery stenosis and plaque stability.Hyperhomocysteinemia can increase the incidence and degree of carotid artery stenosis as well as the number of carotid plaques and unstable plaques.
ABSTRACT
Objective To investigate the initial CT characteristics and dynamic changing features of invasive pulmonary aspergillosis (IPA).Methods CT findings of 40 patients with IPA confirmed by histopathology or clinics were analyzed retrospectively,including the initial and follow-up CT features.Results Multiple lesions in the bilateral lung were found in the initial CT of all 40 patients.The coexistence of no less than two different CT features were showed in 27 patients(67.5 ％),and the same CT morphologic feature were showed in 13 patients (32.5 ％).The common features of the initial CT:nodules/masses (34,85.0 ％),halo sign (24,60.0％),patchy opacities (13,32.5 ％),cavities (9,22.5 ％) and wedge opacities adjacent to pleura (3,7.5 ％).The follow-up CT showed that cavities or air meniscus sign emerged in the nodules/masses after an effective treatment in 29 patients (72.5％) of all 40 cases.The lesion volume decreased subsequent to the collapse of the cavities or air meniscus,and then vanished.Conclusion Thoracic CT scanning play an important role in the diagnosis of IPA.Coexistence of the multiple lesions in number and morphology is the most common CT feature.The findings of follow-up CT is characteristic,and can be helpful in guiding the clinical treatment and evaluating therapeutic effect.
ABSTRACT
Objective To investigate the correlation between HCY (Homocysteine),folate,vitamin B12 and head and neck vascular stenosis in patients with ischemic cerebrovascular disease.Methods 225 patients with ischemic cerebrovascular disease in Tangdu Hospital of the Fourth Military Medical University were enrolled in the study from April 2016 to October 2016.The serum levels of HCY,folate and vitamin B12 were detected.CT angiography (CTA) was uesd for patients with head and neck vascular scanning.According to whether the presence of vascular stenosis,patients were classified as no vessel stenosis group and vascular stenosis group.According to the degree of stenosis,patients were classified as no vascular stenosis group,mild moderate stenosis group and severe stenosis group.Results The HCY levels in the vascular stenosis group were significantly higher than no vessel stenosis group,while the levels of folate and vitamin B12 were significantly lower than no vessel stenosis group,the differences were statistically significant (t=9.656,7.140 and 8.350,all P＜0,01).The HCY levels in mild moderate stenosis group and severe stenosis group were significantly higher than no vessel stenosis group,and the HCY levels in severe stenosis group were significantly higher than mild moderate stenosis group,the differences were statistically significant (t=6.108,9.401 and 5.273,all P＜0.01).The folate levels in mild moderate stenosis group and severe stenosis group were significantly lower than no stenosis group,the differences were statistically significant (t=5.574 and 5.988,all P＜0.01).The vitamin B12 levels in mild moderate stenosis group and severe stenosis group were significantly lower than no stenosis group,the differences were statistically significant (t=4.548 and 7.816,all P＜0.01).The degree of head and neck vascular stenosis and serum levels of HCY were positively correlated (r=0.331,P＜0.01).The degree of head and neck vascular stenosis and levels of vitamin B12 were negatively correlated (r=-0.279,P＜0.05).Conclusion The levels of HCY,folate and vitamin tB12 were closely related to the degree of head and neck vascular stenosis.HCY,folate,vitamin B12 and head and neck CTA play important roles in patients with ischemic cerebrovascular disease clinically.
ABSTRACT
Objective To investigate the expression and clinical significance of HGF and C-Met in cholangiocarcinoma .Meth-ods The levels of HGF and C-Met were measured by ELISA ,the expression of HGF and C-Met in cholangiocarcinoma and health control was detected by immunohistochemistry .Results The preoperative levels of HGF and C-Met in cholangiocarcinoma were higher than the health control(P< 0 .05) .Compared with the preoperative state ,the levels of HGF and C-Met in cholangiocarcino-ma on the 3rd day after operation did not change significantly .However ,the levels of HGF and C-Met on the postoperative 7th and 10th day decreased obviously .In addition ,the expression of HGF and C-Met in cholangiocarcinoma was 76 .2% ,81 .0% ,respective-ly ,which is higher than that in normal tissue ( P < 0 .01) .Conclusion There is an abnormal expression of HGF and C-Met in cholangiocarcinoma ,which may be related to the incidence and development of cholangiocarcinoma .
ABSTRACT
Objective: To evaluate the accuracy and clinical value of fractional lfow reserve (FFR) determined by CT coronary angiography (CTA) in relevant patients. Methods: A total of 43 patients treated in our hospitals from 2013-10 to 2015-10 were retrospectively studied. There were 29 (67.40%) with male gender, the average age was (60.2±10.1) years. The patients received CTA at 1 week prior coronary angiography (CAG), the interval between CTA and CAG was (5.4±1.6) days. FFR was measured by both CAG and CTA (FFRCT) in selected target vessel which was deifned as maximal diameter reduction 50% to 70%. The imaging data were recorded and compared, FFRCT was calculated. Results: 48 vessels from 43 patients were eligible for analysis as target vessels. FFRCT vas evaluated based on the gold criteria of FFR. FFRCT had the diagnostic accuracy at 83.3%, sensitivity 75.0%, speciifcity 89.3% and positive predictive value was 83.3%, negative predictive value was 83.3% respectively. FFR and FFRCT showed obvious correlation (r=0.704,P<0.001); Bland-Altman analysis presented good concordance with 95% limits of agreement for FFRCTand FFR value ranged from -0.12 to 0.16, and 95.8% of the points (46/48) fell in the 95% limit of agreement, Receiver operating characteristic curve indicated that AUC of FFRCT was 0.871 (95% CI 0.770-0.973). Conclusion: CTA could accurately assess FFR, and FFRCT might be used in guiding the treatment for patients with intermediate coronary stenosis in clinical practice.
ABSTRACT
We describe the case of a 79-year-old male presented with sudden onset of abdominal pain and mild breathlessness, and complicated acute progressive anemia with haemoglobin which declined from 120 g/L to 70 g/L within five days. An urgent computed tomography an-giography showed acute thoracic aortic dissection, DeBakey type IIIb, a dissecting aneurysm in the proximal descending thoracic aorta start-ing immediately after the origin of the left subclavian artery and extending distally below the renal arteries with evidence of rupture into the right pleural cavity for massive pleural effusion. Plasma D-dimer, brain natriuretic peptide and C reactive protein level were elevated. Our case showed that D-dimer can be used as a‘rule-out’ test in patients with suspected aortic dissection. A raised BNP may exert a protective role through anti-inflammatory endothelial actions in the systemic circulation.
ABSTRACT
Objective To explore MRI characteristics of virus encephalitis and its relevance with pathlological changes,and to improve understanding MRI features of virus encephalitis.Methods Seventeen cases of virus encephalitis clinically proven were collected and reviewed.The correlation between MRI findigns and pathology were analyzed.MRI examinations included plain scan and FLAIR scan in all 17 patients,among which 13 underwent contrast-enhanced MR scanning.Results The lesions mainly located at the cerebral cortex gray matter and the cerebrum subcortical gray matter nuclei.16 cases appeared as multiple foci,and 1 case was single focus.The foci had definite margins and with no obvious peripheral edema.The lesions were slightly hypo-or iso-intense on T_1WI,slightly intensity on T_2WI and obvious high signal intensity on FLAIR.After enhanced scan,the lesions were no obvious enhancement in 2 cases,enhancement line in the surfaces of the brain in 15 cases,in which the lesions showed patch enhancement in 6 cases and gyrus-like enhancement in 2 cases.Conclusion The pathological changes of viral encephalitis can be reflexed with MR imaging features,which is of important value in the differential diagnosis of virus encephalitis.
ABSTRACT
Objective To investigate the signaling cascades involved in the regulatory effects of reactive oxygen species(ROS)on adiponectin expression in 3T3-L1 adipocytes.Methods 3T3-L1 cells were cultured and differentiated into mature adipocytes.Adiponectin mRNA expression was evaluated by quantitative real-time PCR.The signaling pathways associated with ROS-decreased adiponectin expression were screened by Bioplex phosphoprotein assays and various protein kinase inhibitors.Results As an important ROS,H_2O_2activated several signaling pathways including extracellular signal regulated protein kinase 1/2(ERK1/2),c-Jun N-terminal kinase (JNK),protein kinase B(Akt),p70 S6 kinase(p70 S6K),and Janus kinase/signal transducer and activator of transcription(JAK/STAT).Akt and JAK/STAT inhibitors completely reversed H_2O_2-decreased adiponectin expression(both P<0.01).Conclusions ROS markedly down-regulates adiponeetin expression in 313-L1 adipocytes by activating Akt and JAK/STAT signaling pathways,which may contribute to the development of obesity and its related diseases.
ABSTRACT
Objective To study the value of~1H-magnetic resonance spectroscopy(~1H-MRS) and diffusion weighted imaging(DWI) in evaluating the changes of pathological structures of hippocampal sclerosis.Methods Twelve normal controls and twelve cases with temporal lobe epilepsy were examined by conventional MRI,~1H-MRS and DWI.The NAA/(Cr+Cho) ratios and ADC values in the hippocampus were measured and compared between patients and normal controls.Results The NAA/(Cr+Cho) ratios of hippocampus in patients with hippocampal sclerosis were significant decrease in comparison with controls and the contralateral side,and the ADC values were also significant increase.There was correlation between the NAA/(Cr+Cho) ratios and ADC values in the disordered hippocampus(r=-0.79,P=0.002).Conclusion There is a significant correlation between the NAA/(Cr+Cho) ratios and ADC values in the hippocampal sclerosis.~1H-MRS and DWI capture partially complementary aspects of hippocampal pathology noninvasively in vivo.
ABSTRACT
Objective To provide theoretical evidences for diagnosis of bladder neoplasm by using more information of imaging features. Methods MRI images of bladder neoplasm were collected for this research. The ROI (region of interest) area was selected manually,and noise reduction and sharpening were applied to the ROI area by using LoG (Laplacian of Gaussian) filter. The texture features of bladder neoplasm and normal bladder wall (smooth muscle),such as mean grey-level intensity,entropy,uniformity were calculated. A statistical analysis was made at last. Results The values of texture features were analyzed by t-test. Entropy and uniformity show significant differences between the two groups. But Mean grey-level intensity hasn't indicated this difference. Conclusion This texture features may be applied to decide the invasive depth of bladder neoplasm,it also means that the stage of bladder neoplasm may be fixed by this system.
ABSTRACT
<p><b>OBJECTIVE</b>To observe the ultrastructures of rat alveolar type II cells and change of composition of phospholipid(PL) and content of protein in pulmonary surfactant(PS), to investigate the relation between change in composition of PL and activity of alveolar type II cells.</p><p><b>METHODS</b>The rats lung injury models were made by intratracheally instilling bleomycin(BLM) (4 mg/ml, 5 mg/kg). 28 rats were divided into four groups: 3-day group, 7-day group, 14-day group and 28-day group. Preparations of each group were stained histochemically and examined by electron microscope, content of PL in BALF, composition of PL and content of protein of each group were determined respectively.</p><p><b>RESULTS</b>(1) Rats lungs in experimental groups were found that PS lost continuously, appeared homogenous and chorionic, dropped in the pulmonary alveolies. 3-day group was more apparent. Ruthenium red attaching on pulmonary surfactant was thicker in 3-day group, and the colour deeper, no difference in 7-day group and 14-day group, thinner in 28-day group. Content of PL in PS of BALF was increasing. Content of phosphatidylglycerol(PG) increased in 3-day group, decreased in 7-day, 14-day and 28-day group. The change of content of phosphatidylinositol(PI) was reversed. (2) Alveolar type II cells degenerated, necrotized, even disintegrated in 3-day group and 7-day group. 3-day group was more apparent. Proliferations of alveolar type II cells were found in each group, 7-day group was more apparent. We found that type II cells transformed to type I cells in 14-day group, extended and attached on bare basement membrane. Content of protein in PS was the highest in 3-day group, almost equal to the content of the control group in 28-day group.</p><p><b>CONCLUSION</b>Morphologic change and alternation of quality and quantity of PS after bleomycin-induced pulmonary injures specifically reflect the activity of alveolar type II cells. Measuring content of PL in BALF is one of simple and feasible method judging activity of alveolar type II cells when lungs of the rats are injured early by bleomycin.</p>
Subject(s)
Animals , Rats , Antibiotics, Antineoplastic , Toxicity , Bleomycin , Toxicity , Bronchoalveolar Lavage Fluid , Chemistry , Lung , Pathology , Pulmonary Alveoli , Chemistry , Pulmonary SurfactantsABSTRACT
Objective To analyze the MRI characteristics of cavernous angioma of the epidural space in spine.Methods MR imaging features of cavernous angioma of epidural space in 3 cases confirmed by surgery-pathology were analysed with literature review . Results Among the three cases,the tumors located in the lumbar spine in one and in the thoracic spine in 2.The tumors were all at posterior to the spinal cord and shuttle-shaped,the major axis was consistent with the spinal ordinate axis,the corresponding plane spinal cords were compressed and resulting in distortion and shift.The tumors were high signal intensity on T_2WI,and obviously homogeneous enhanced after Gd-DTPA administration. Conclusion MRI examination is the best method to diagnose this kind of disease.
ABSTRACT
Objective To explore the role of the transforming growth factor-?1 (TGF-?1) and the vascular endothelial growth factor (VEGF) in the occurrence and development of the pulmonary fibrosis as well as the synthesis and distribution of these two factors in relation to the angiogenesis process of the pulmonary tissues. Methods The rats were randomly assigned to control group (CG) and bleomycin group (BLM) with the same physical conditions. The bleomycin was introduced to the lung tissues of the rats in the BLM group to mimic the pulmonary fibrosis process. The synthesis and distribution of VEGF and TGF-?1 were observed and recorded on day 3, 7, 14, and 28 in both groups by the immunohistochemical and in situ hybridization approaches. The pathological changes of the subjects were also observed and recorded using both the light-microscope and the transmission electron microscope (TEM) on the same dates.Results The BLM group demonstrated the great significance in both of the VEGF and TGF-?1 presentation and the pathological changes in the pulmonary tissues comparing to the CG group. In the BLM group, VEGF and TGF-?1presented dramatically in the early stages of the fibrosis and this phenomenon lasted with the parallel increases of both the factors. This presentation of VEGF and TGF-?1 showed the greatest distribution on day 28 in the lung interstitial cells and the areas of the presentation corresponded to that of the new angiogenesis and the fibrohyperplacia of the pulmonary tissues. The endothelial cells of the lung capillaries were observed to demonstrate early necrosis, separation from the base, and increased penetrance followed by a great amount of angiogenesis with twisted new blood capillaries and blood embolism formation within, which continued to show on day 28 in the BLM group.Conclusion The presentation of VEGF and TGF-?1 is highly corresponded with the angiogenesis of the bleomycin treated pulmonary tissues in the rats. The continued significant presentation of these two factors may relate to the damage of the new formed capillaries or the impairment of the pulmonary tissues in rats.
ABSTRACT
0.05).Early pathology phenotype of BLM groups was similar as those of pneumonia groups.But in day 14th and day 28th groups,the ratio of macrophagus positive area in lung interstitium was bigger than that of control group(P