Objective To investigate the clinical,endoscopic and pathologic features in the differential diagnosis between Crohn' s disease (CD) and intestinal tuberculosis (ITB).Methods The complete clinical data of 107 patients with CD and 69 patients with ITB in our hospital from January 2011 to January 2012 were retrospectively analyzed.The diagnostic value of the clinical and endoscopic scoring system was evaluated.Results CD occurred mainly in male.The salient features of CD included long duration of disease high incidence of colectomy.Comparing with patients with ITB,patients with CD have more cases of diarrhea,hematochezia,abdominal mass,intestinal obstruction,intestinal hemorrhage,perianal lesions,and extraintestinal manifestations (all P ＜ 0.05).It's more frequent to have positive results of anti-Saccharomyces cerevisiae antibody (ASCA),perinuclear antineutrophil cytoplasmic antibody (pANCA) and fecal occult blood in CD patients,as well as low albumin,high C-reactive protein (CRP),elevated platelet count and hematocrit (P ＜ 0.05 or P ＜ 0.01).The salient features of ITB included low fever,night sweats,active parenteral tuberculosis,increased erythrocyte sedimentation rate (ESR),chest X-ray abnormalities,the positive PPD (purified protein derivatives tuberculin) and T-SPOT (P ＜ 0.05 or P ＜0.01).Based on the imaging,CD often involved the small intestine,such as the intestinal stricture and abdominal abscess (P ＜ 0.05),while mesenteric lymphadenopathy was more common in ITB (P ＜ 0.05).The endoscopic examination showed that some patterns of disease involvement such as fissure-shape ulcer [41.12％ (44/107) vs 5.80％ (4/69)],cobblestone sign [15.89％ (17/107) vs 4.35％ (3/69)],lesions over four segment [24.30％ (26/107) vs 7.25％ (5/69)],rectum involvement [17.76％ (19/107) vs 5.80％ (4/69)],ileocecal valve stenosis [21.50％ (23/107) vs 8.70％ (6/69)] and mucosal bridge [5.61％ (6/107) vs 0(0/69)] were more frequent in CD patients than those in ITB patients(P ＜ 0.01 or P ＜0.05).However circular ulcers[37.68％ (26/69) vs 9.35％ (10/107)],rat-bite-like ulcers[24.64％ (17/69) vs 12.15％ (13/107)],persistent open ileocecal valves [39.13％ (27/69) vs 19.63％ (21/107)],tuberous and polypoid lesions [36.23％ (25/69) vs 20.56％ (22/107),37.68％ (26/69) vs 22.43％ (24/107)] were more common in ITB (P ＜ 0.01 or P ＜ 0.05).In terms of pathological findings,certain characteristic features such as transmural inflammation [5.61％ (6/107) vs 0 (0/69)],fissure-liked ulcers [14.02％ (15/107) vs 4.35％ (3/69)],non-caseous granulomas [5.61％ (6/107) vs 0(0/69)],lymphoid hyperplasia [16.82％ (18/107) vs 5.80％ (4/69)] and crypt abscess [9.35％ (10/107) vs 1.45％ (1/69)] were more common in CD than those in ITB(P ＜ 0.05).According to the clinical and endoscopic scoring system,the positive diagnostic rate of CD was 50.47 ％ (54/107)and of ITB was 66.67 ％ (46/69) (P ＜ 0.05).Conclusions The differential diagnosis between CD and ITB should be considered carefully based on clinical,endoscopic,pathological characteristics.The clinical and endoscopic scoring system may contribute to distinguish CD and ITB.

Objective To explore whether the presence of juxtapapillary duodenal diverticula (JPDD) risks biliary stone disease and recurrence.Methods 829 patients undergoing ERCP in our hospital from Aug 2008 to Dec 2012 were divided into four groups:biliary stone disease (n =609) non-stone biliary abnormality (n =124) common bile duct malformation with cholelithiasis (n =38) and normal control group (n =58).There were 206 patients with JPDD and 623 patients without JPDD.Biliary stoneformation,post-ERCP pancreatitis,cannulation failure,and stone recurrence were compared between those with JPDD and those without.Results The incidence of JPDD in biliary stone disease group (27.8％) was significantly higher than in non-stone biliary anatomical abnormality group (18.5 ％) (x2 =4.512,P ＜ 0.05).In biliary stone disease group,rates of post-ERCP pancreatitis were significantly higher in JPDD cases (33.7％) compared to those without JPDD (13.8％) (x2 =30.841,P ＜ 0.05).The cannulation failure rate was also higher in patients with JPDD (15.4％) compared to JPDD negative (6.8％) (x2 =0.731,P ＜0.05).Recurrence rates in biliary stone disease were significantly higher in patients with JPDD (19.5％) when compared to JPDD-lacking individuals (9.3％) (x2 =14.51,P ＜ 0.05).Conclusions JPDD is a risk factor for biliary stone formation.JPDD also is associated with post-ERCP pancreatitis,cannulation failure and biliary stone recurrence.

Objective To analyze the image characteristics of chest schwannoma in coincidence 18FFDG SPECT studies,and to evaluate its prospective diagnostic function on chest schwannoma.Methods Four cases confirmed as schwannoma by surgery and pathology were enrolled in this retrospective study.Enhanced CT and coincidence 18F-FDG SPECT studies were performed before surgery.Imaging characteristics for the diagnosis of chest schwannoma were summarized.Results Tumors were totally removed by surgery.The histological diagnosis of schwannoma was confirmed by pathological,HE and immunohistological staining examination (positivity for the S-100 protein and vimentin),including 1 case of malignant schwannoma and 3 cases of benign.Four cases all showed high uptake of 18F-FDG.The uptake in malignant schwannoma was much higher than that in benign schwannoma.Benign schwannomas were noninvasive masses and mainly showed compression symptoms,with obvious lobulation and distinct borders.Malignant schwannoma was invasive masses.Conclusions 18 F-FDG coincidence SPECT is of limited value as a prospective diagnostic imaging technique for the identification of benign schwannoma from malignant schwannoma.But it could play an important role in the staging,restaging,and post-therapy follow-up of schwannoma.

Objective To investigate the application of leukoreduction filter in removal of leukocytes in platelet concentrate . Methods Platelet concentrate was prepared by using platelet‐rich plasma method .35 bags of the same type of prepared platelet concentrate were filtered by using leukoreduction filter .The changes of conventional indicators of platelet before and after filter were measured and recorded .The activating platelets indicators PAC‐1 and CD62p were detected by using flow cytometry .The platelet hypotonic shock was measured by biochemical analyzer .The platelet aggregation was measured by using platelet aggrega‐tion instrument .Results After platelet concentrate was filtered by using leukoreduction filter ,leukocyte removal rate was(98 .28 ± 0 .97)% ,platelet recovery rate was(86 .37 ± 2 .84)% .After filtration ,white blood cell count ,platelets ,red blood cells were reduced than before filtration(P<0 .05) .The differences of capacity of platelets ,mean platelet volume and pH before and after filtration were not statistically significant(P> 0 .05) .Before and after filtration ,the expression of platelet activation markers PAC‐1 and CD62p ,platelet aggregation and platelet hypotonic shock were not statistically different(P>0 .05) .Conclusion Platelet leukore‐duction filter could effectively filter leukocytes in platelet concentrate .It would not change the conventional indicators ,and not affect platelet activation ,aggregation and anti‐hypotonic shock capacity significantly .

Objective To evaluate the effects of various head and neck postures and phonation on oropharyngeal view(Mallampati score),and ex-plore the correlation with laryngoscopic view tested by the improved Cormach-Lehane score(MCLS). Methods Following the local ethics commit-tee approval and patients′informed consent to anesthesia,124 patients were enrolled for this study. Prior to anesthesia,these patients were placed in supine position with various head and neck positions for oropharyngeal structures visualization and evaluation,including two head positions(neu-tral and full extension),two tongue positions(in and out),and with and without phonation,according to the modified Mallampati test score(MMT). Following induction,laryngoscopic view scores according to MCLS were recorded,then the sensitivity,specificity,positive and negative predictive value and accuracy of the various MMT scores were calculated. Correlation coefficient(r)of MMT scores with MCLS were also studied. Results Mallampati score was decreased in all the postures of head full extension,tongue outside and phonation,which makes oropharyngeal structures to be better visualized. There is no correlation between MMT scores and MCLS. The sensitivity,specificity,positive and negative predictive value and accu-racy of the various MMT scores is most satisfied in the posture of head full extension,tongue outside and phonation. Conclusion During airway as-sessment in supine position,the best posture is head full extension,tongue outside and phonation.

Objective To evaluate the diagnostic value of dobutamine?stressed cardiac morphing ( CM) MPI ( CMMPI) for coronary artery disease ( CAD) in middle?aged patients. Methods A total of 97 middle?aged patients (52 males, 45 females, age 40-65 (52.98±7.74) years) from March 2011 to Febru?ary 2015 with chest distress, cardiopalmus and chest pain symptoms ( suspected CAD) were retrospectively studied. Informed consents were signed by patients before examination. All patients underwent one?day dobu?tamine?stressed/rest CMMPI and CAG within one month. The diagnostic value of CMMPI was assessed and compared with CAG. Results CMMPI revealed 42 abnormal cases and 9 normal cases in 51 cases with cor?onary artery stenosis by CAG. CMMPI found 11 abnormal cases and 35 normal cases in 46 cases with normal coronary artery by CAG. In comparison with CAG, the sensitivity, specificity, accuracy, positive predictive value and negative predictive value of CMMPI were 82.35%(42/51), 76.09%(35/46), 79.38%(77/97), 79.25%(42/53)and 79.55%(35/44) respectively. The side effect was slight and transient with an inci?dence of 82.47%(80/97). Conclusion The dobutamine?stressed CMMPI has an important value for the diagnosis of CAD and the assessment of myocardial damage in middle?aged patients.

Objective To summary therapeutic method for delayed portal vein thrombosis after liver transplantation. Methods In 3100 cases undergoing cadaveric whole liver transplantation in a single center, there were 12 cases of delayed portal vein thrombosis after liver transplantation.Average occurring time was 29. 8 months after liver transplantation. Among these 12 patients, 2 cases were complicated with severe biliary complication (intrahepatic stricture) , 2 cases presented with liver failure of transplanted liver, and one case had portal vein compression by hepatic hilum tumor under the image examination, who received liver re-transplantation; two patients presented upper gastrointestinal bleeding, and they experienced endoscopic ligation and sclerotherapy respectively; the rest five patients without any clinical presentation were subjected to anticoagulation and antiplatelet therapy. Results Among 12 cases, 8 patients survived by the time of follow-up, including two patients undergoing re-transplantation; one patient lost follow-up. The liver function tests of the patients who survived were all normal. Conclusion The individualized therapeutic methods should be adopted for the patients with delayed portal vein thrombosis after liver transplantation.

ObjectiveTo summary clinical character of de novo hepatitis B virus infection after liver transplantation,and explore the strategy of prevention and treatment.MethodsThe clinical data of recipients undergoing liver transplantation and the recipients who developed de novo hepatitis B virus infection after liver transplantation between Jan. 2000 to Dec. 2010 were retrospectively analyzed.Results365 patients who underwent liver transplantation were negative for serum HBsAg before liver transplantation.Among them,11patients were diagnosed as having de novo hepatitis B virus infection after liver transplantation,with the morbidity being 3.0 ％(11/365).Most recipients did not have any clinical presentation.They were just found HBsAg positive during the follow-up period.The liver functions were normal.All 11patients received anti-virus therapy after they were found having positive HBsAg and replicated HBV-DNA.One patient whose primary disease was hepatitis C combined with primary hepatic carcinoma was treated with pegylated interferon,thereafter,he was found having YMDD-mutation of HBV-DNA,and he was treated with entecavir.The rest 10 patients received anti-virus treatment with nucleoside analog.The 10 recipients were injected with hepatitis B immunoglobin during operation.After anti-HBV therapy,one patient died from acute liver failure because of inefficient treatment,and one patient died from tumor recurrence.The remaining nine patients survived:HBeAg of one patient became negative,and HBV-DNA replications of the four patients became negative (＜1×105 copies/L).The liver function of the patients who survived was normal.ConclusionFor recipients who were HBsAg negative before liver transplantation,when they received liver transplantation,,they should be given strict screening of blood product for transfusion.The liver transplantation patient who is HBsAg negative in serum before liver transplantation,and whose donor is HBcAb positive in serum and/or HBV-DNA positive in serum,should be treated with HBIG and/or nucleoside analog during operation or after operation,as we said above is a ideal strategy to prevent de novo hepatitis B virus infection after liver transplantation.The prognosis of de novo hepatitis B virus infection after liver transplantation is mild.

Objective To investigate the biodistribution and gamma imaging of 99Tcm-arginine-glutamate-threonine (RET) in nude mice bearing lung cancer xenografts and to explore its feasibility for human lung cancer imaging.Methods RET was labeled directly with 99Tcm.The binding efficiency of 99Tcm-RET with human NSCLC H1299 cells was measured.99Tcm-RET was injected via the tail vein in nude mice bearing H1299 xenografts.The mice(n=32) were sacrificed at different time points:15 min,30 min,1 h,2 h,4 h,8 h,24 h,and 48 h.Organs of interest were excised,weighted and counted by a gamma counter.The organ uptake was calculated as ％ID/g.The gamma imaging was performed on 3 mice at 0.5,1,2,4,4.5,5,6 h after intravenous injection of 4.81 MBq 99Tcm-RET.Results The radiolabeling yield of 99Tcm-RET was (93.15±2.02)％,and the binding efficiency of 99Tcm-RET with H1299 cells was (3.56±0.37)％.At 4 h after injection,the uptake of tumor,liver and spleen was (4.96±1.05) ％ID/g,(15.89±1.84) ％ID/g and (10.83±1.66) ％ID/g and the T/NT was 5.70±0.21 for the heart and 12.40±0.11 for the blood.The tumor in nude mice could be best visualized at 4.5-6.0 h.Conclusion 99Tcm-RET might have potential to serve as a lung cancer imaging agent.

Objective To investigate the characteristics of fractional anisotropy (FA) and apparent diffusion coefficient (ADC) of association fiber tracts in patients with amnestic mild cognitive impairment (aMCI), and to assess the application value of diffusion tensor imaging (DTI) in differential diagnosis of aMCI and AD. Methods DTI were performed in 20 patients of aMCI (aMCI group), 20 patients of AD (AD group) and 20 normal control subjects (control group). FA and ADC values were calculated in the regions of interest (ROI) in inferior fronto-occipital fasciculus (IFOF), genu and splenium of corpus callosum, superior longitudinal fasciclesⅡ (SLFⅡ) and cingulated bundles. Results There was significant difference of FA values in inferior fronto-occipital fasciculus and cingulate bundles between aMCI group compared with control group (P<0.05), as well as of FA values in cingulate bundles between aMCI group and AD group (P<0.05). Conclusion Abnormal FA values in inferior fronto-occipital fasciculus and cingulate bundles suggest that DTI can be used as a diagnosis index of aMCI. Furthermore, it is helpful in the differential diagnosis of aMCI and AD.