[Objective]To investigate the correlation of sagittal parameters in L5~S1 isthmic spondylolisthesis and its clinical manifestation.[Method]Seventy-six patients with L5~S1 isthmic spondylolisthesis were treated between January 2000 and December 2005,there were 32 males and 44 females with the age between 12 and 68 years.The lateral standing radiographs of the spine and pelvis were analyzed retrospectively.Radiographic parameters measured including pelvic incidence(PI),sacral slope(SS),lumbar lordosis(LL),lumbosacral angle(LSA)and grade of spondylolisthesis.All measurements were done by the same individual and compared to those of a cohort of 30 normal subjects.Students test was used to compare the parameters between the curve types and Pearsons correlation coefficients were used to investigate the association between all parameters(P

Objective To explore the features of clinicopathology,gastroscopy,endoscopic ultrasonography (EUS) and immunohistochemistry of esophageal mesenchymal tumors (EMT).Methods The clinical data of 98 cases of EMT patients who underwent endoscopic biopsy,endoscopic treatment or surgery and were diagnosed according to pathological and immunohistochemistry examination were collected.The clinicopathologic characteristics,endoscopy,EUS and immunohistochemistry of these cases were retrospectively analyzed,and differentiated from other submucosal tumor.Results Among the 98 cases of EMT,there were 77 leiomyomas (LM),15 gastrointestinal stromal tumors (GIST),four lipomas,one leiomyoblastoma and one schwannoma.The age of GIST group were older than that of LM group,and most were male patients predominated in these two groups.Dysphagia was the most common symptom of EMT.Gastrointestinal bleeding was rare,which was different from other gastrointestinal mesenchymal tumors.Under endoscopy,the appearances of EMT were similar,as submucosal protuberant lesions.One esophageal GIST was extraluminal lesion.Under EUS,LM,GIST and schwannoma showed low echo images originated from the muscularis propria or muscularis mucosa.Lipomas showed high echo images originated from submucosa.Pathological examination indicated that main cell type of LM and schwannoma was spindle cell,part of GIST was epitheloid cell type.The expressions of CD117 and CD34 were high in GIST,the expressions of SMA and Desmin were high in LM.S-100 was expressed in schwannoma.Other submucosal tumors,such as esophageal cyst,esophageal tuberculosis,esophageal carcinosarcoma,and some esophageal squamous carcinoma were easily misdiagnosed as EMT.Conclusions Esophageal LM is the most common EMT,followed by GIST.EUS is helpful in EMT diagnosis,however it can not accurately distinguish GIST,LM or schwannoma.

Chemical disinfectants are generally used for virus inactivation and environment disinfection in biosafety laboratory, and the efficacy and evaluation of the disinfection are critical to ensure the laboratory biosafety.However, there is a current lack of applied standard to evaluate the virucidal efficacy of chemical disinfectants in our country.In this paper, a European Union standard“Method and Requirements of Virucidal Quantitative Suspension Test Method for Chemical Disinfectants Used in Human Medicine” was analyzed and a standard transformation scheme has been proposed.It is suggested that the model viruses should be increased from 3 to 6, including the surrogate viruses to substitute highly pathogenic viruses, and that the method to remove the residual chemical disinfectant and the calculation of 95%confidence interval should be incorporated into the standard.The suggestion will improve the scientific and operational standards related to disinfection and sterilization in biosafety laboratory in China.

Objective: To evaluate the therapeutic effect of gamma knife on patients with intracranial cavernous angioma (CA). Methods: The medical records of 122 patients (134 lesions) who underwent radiosurgery were reviewed retrospectively. Results: hT e average follow-up period was 43 months. No patient died. One patient underwent CA resection. In patients with epilepsy, 83% patients showed alleviation of seizures. About 44% of the lesions shrank in size after treatment with gamma knife radiosurgery (59/134). Seven cases had hemorrhage again after radiosurgery, and the overall annual hemorrhage rate was 1.6%. Edema was found in 11.5% patients (14/122) and all patients showed improvement atf er treatment. Conclusion: Gamma knife is a safe treatment for CA, which could obviously improve the symptoms of epilepsy. Gamma knife radiosurgery is the if rst option for the treatment of cavernous sinus angiomas.

A rapid and sensitive method has been developed for the simultaneous determination of four selenium species Se(Ⅵ), Se(Ⅵ), selenomethionine, and Se-methylselenocysteine in Se-enriched yeast by liquid chromatography-hydride generation atomic fluorescence spectrometry (HPLC-HG-AFS). The isolation of the analytes from yeast samples was accomplished by proteaseⅩⅣ and trypsin enzymatic digestion. The target compounds were separated on a PRP-X100 anion exchange column and analyzed by HG-AFS. The mobile phase was 20 mmol/L (NH4)2HPO4. Good linearity was obtained for all the selenium species, with linear correlation coefficients higher than 0. 9996. The LODs of the four species were between 0. 5 and 5. 0 μg/kg. Average recoveries for the four analytes were in the ranges of 82 . 5%-101 . 2%, with intra-and inter-day RSD lower than 8. 6% and 14. 5, respectively. The proposed analytical method is simple, sensitive, with low operation cost, making it applicable for the determination of the selenium species in Se-enriched feeds.

Intraductal papillary mucinous neoplasm (IPMN) is a kind of epithelial neoplasms of mucin-producing cells arising in the main duct and/or branch ducts of the pancreas,and it is one of the precancerous lesions of the pancreatic cancer.With the development of pathology and radiology,the diagnostic rate of IPMN has been gradually increased and given a new understanding on the pathological characteristics,clinical diagnosis and treatment of IPMN.This review overviewed the classification,diagnosis,management and prognosis of IPMN,aiming to deepen the understanding of IPMN and improve the level of diagnosis and treatment.

BACKGROUND: Pathogenesis and pathophysiological changes of chronic compressive cervical myelopathy havenotbeen completely clarified.OBJECTIVE: To establish an animal model of experimental chronic compressive cervical myelopathy for the exploration of the pathological and electrophysiological changes after chronic spinal compression.DESIGN: A randomized and controlled observatory study using experimental animals as subjects.SETTING: An Animal Experimental Center of a University and an Orthopaedic Laboratory of Affiliated Hospital of a Military Medical University MATERIALS: The study was conducted in the Animal Experimental Center of Nantong Medical University and the Orthopaedic Laboratory of Shanghai Changzheng Hospital from June 2002 to April 2003. Sixty 12-week healthy Chinese rabbits of either gender with a bodymass between 2.5 kg and 3.0 kg were randomly divided into control group( n = 6) and study group( n = 54).METHODS: Titanic metal screw was put into C5 vertebra through cervical anterior approach for progressive compression to establish chronic cervical myelopathy model.MAIN OUTCOME MEASURES:Principal consequences: ①histological examination ;②electrophysiological examination. Secondary consequence:neural function evaluation.RESULTS: Totally 48 rabbits entered into result analysis, in which 6 rabbits from control group and 42 rabbits from study group. Modified Tarlov's motor function evaluation was 3 in 31 rabbits with compression signs, and 4 in 11rabbits without compression signs. The latency of N1 wave in cortical somatosensory evoked potentials (CSEP) was (9.11 ± 1.61 ), ( 11.36 ± 2.17)and (17.55 ± 3.73) ms respectively in animals of control group, animals of study group without compression signs and animals of study group with compression signs. The lantency of CSEP N1 wave was significantly longer in animals of study group with compression signs than that of the animals in the control group and study group without compression signs (P＜0.05).CONCLUSION: This animal model can simulate clinical invasion process of chronic compressive cervical myelopathy. The severer the spinal compression is, the more often the compression signs appear, the longer the lantency of CSEP N1 wave is, and the more serious the spinal pathological damages are.

Objective To investigate the regulation and the mechanism of Melatonin in calcium overload of pancreatic acinar cell in acute necrotizing pancreatitis (ANP). Methods Fifty-four Sprague-Dawley (SD) rats were equally divided into three groups:sham-operation group (SO group),ANP group (created with retrograde cholangiopancreatography injection of sodium taurocholate) and MT group (ANP model made after intra-peritoneal injection MT for 30 mins).Rats were sacrificed at 1,4 and 8hours after operation and pancreas tissues were underwent pathological examination.The free calcium concentration of pancreas tissues was determined by fluorescence minitoring method; and the expression of CaMK Ⅱ in pancreas tissues at mRNA and protein level was tested by real-time PCR and Western Blot.Results Pancreatic pathological injury in ANP groups was progressively severe as time extended,which was obviously ameliorated in MT group compared with ANP group (the t value of compared pathological score at 1,4 and 8 hour was:-7.95,-9.72 and -7.69,all P=0.00).Compared at same time point,the free Ca2+ concentration of pancreas tissues in ANP group was significantly higher than that of SO group (the t value of 1,4 and 8 hour was 13.09,18.58 and 16.56,all P=0.00).It was a little bit higher in MT group compared with that of SO group,however was significantly lower than that of ANP group (the t value of 1,4 and 8 hour was -10.03,-11.75 and -11.02,all P =0.00).Compared with SO group,the expression of CaMK Ⅱ at mRNA and protein level significantly increased in ANP group; MT significantly inhibited its expression.Conclusions The expression of CaMK Ⅱ may be inhibited by MT interfere,and then lower the calcium overload in pancreatic acinar cell,which play a role in pancreas tissue protection.

Objective To explore the differences and similarities of clinical characteristics,pathological features, treatment and prognosis between primary gastric lymphoma(PGL)and primary intestinal lymphoma (PIL). Methods The clinical characteristics, pathological features, therapeutic results, the detection of Helicobacter pylori (Hp) and prognosis of 48 PGL cases and 15 PIL cases were retrospectively analyzed. Results There was no statistical significance in age, gender, abdominal pain, gastrointestinal bleeding, B symptoms, clinical stage, mortality between PGL and PIL groups (P>0. 05). However, there were significant differences in the pathological type, acute abdomen emergency surgery between these two groups (P<0. 05). There was 12 Hp positive cases in mucosalassociated lymphoid tissue (MALT) lymphoma of PGL group (12/19), and 5 Hp positive cases in diffuse large B-cell lymphoma (DLBCL) (5/20). There was significant difference in Hp detection rate of these two pathological types. Hp was not found in PIL group. The Cox multivariate analysis indicated that stage Ⅲ-Ⅳ was the independent adverse factors affecting PGL prognosis (P<0. 05).Conclusions Mainly histological types are DLBCL and MALT lymphoma in PGL, and DLBCL in PIL.PIL predispose to T-cell lymphoma compared with PGL. MALT lymphoma is rare in PIL group. The mainly clinical stage is Ⅲ-Ⅳ both in PGL group and PIL group. Emergency surgery is often needed in PIL because of intussusception or perforation. The prognosis of PGL is correlated with the stage and the prognosis of PIL are correlated with the stage, B symptoms and T cell phenotype.