OBJECTIVE: To investigate the treatment of retinal redetachment after vitrectomy and silicone oil tamponade, METHODS: Investigating retrospectively on the treatment effect of 8 cases of redetachment of retina with proliferative vitreoretinopathy(PVR) in which the retinas had been attached formerly after vetrectomy and silicone oil tamponade opertion. The reoperative procedures included pars plana vitrectonly, membranes peeling, retinotomy, inner exchange of the fluid and silicone oil tamponade and subretinal membranes were removed out in 2 eyes. RESULTS: Six eyes had anatomical reattachment postoperatively and another 2 eyes still had inferior shallow retinal detachment. Visual acuity was improved in 6 patients and remained unchange in 2 patients. CON CLUSIONS: The cause of recurrent retinal detachment might be the formation of the proliferative epiretinal and subretinal membranes, and vitrectomy to release the traction of proliferative membranes and full fluid silicone oil exchange should do good to reattachment.

Objective To study the immunogenicity of extractable nuclear antigens(ENA)in activateed lymphocytes.Methods The ENA of the normal and activated lymphocytes was extracted according to Sharp's method,then syngeneic BALB/C mice were immunized.The dynamic fluctuation of serum IgG anti-dsDNA antibody level in mice was analyzed by ELISA,so did the ENA polypeptide spectrum.The immunofluorescent staining pattern of ANA and renal immunopathologic changes of the mice were investigated.Results ANA could be detected in the sera of the immunized mice by the ENA extracted from the activated lymphocytes,including anti-dsDNA and anti-ENA.The immunofluorescent staining patterns for ANA manifested as homogeneous pattern,peripheral pattern,speckled pattern and nucleolar pattern.Moreover,marked immune complex deposits in glomerulus could be observed in ANA positive mice.The results in those mice immunized by the normal-lymphocyte-ENA were negative.Conclusion The ENA extracted from activated lymphocytes is immunogenic,can drive the production of ANA and cause SLE-like syndrome.

Objective　To explore the possibility of R plasmid (pRST98) encoding resistance to antimicrobial agents in S. typhi mediate virulence to its host bacteria. Methods　pRST98 was transferred into a less virulent strain of S. typhimurium RIA for creating a transconjugant pRST98/RIA. The standard S. typhimurium virulence strain SR-11 which carries a 100kb virulence plasmid was used as a positive control, and RIA as a negative one. Infection with S. typhimurium was employed to assess the effect of pRST98 on the virulence of host bacteria by LD50 of peroral (p.o.) and intraperitoneal (i.p.) infection of BALB/c mice. After oral inoculation of the bacteria into BALB/c mice, mesenteric lymph nodes, spleen and liver were examined for quantity of bacteria and for the histopathological changes. The three strains were also studied for their in vitro adhesion and invasion of HEp-2, CHO and HeLa cells. Three chromosomally isogenic strains, i.e., plasmid-containing wild-type S. typhi strain, plasmid artificially cured strain and plasmid-reintroduced into the cured strain were compared for their resistance to the bactericidal activity present in human, rabbit and guinea pig sera. Results　The p.o. and i.p. LD50 of pRST98/RIA was 700 and 75 folds less than that of RIA. The bacteria counting in mesenteric lymph nodes, spleen and liver were more (P<0.05) and more severe histopathological changes were observed in pRST98 harboring S. typhimurium. However, pRST98 did not affect the adhesion and invasion of S. typhimurium to the cells. Experiments showed that pRST98 mediated resistance to serum bactericidal effect in host bacteria (P<0.05). Conclusion　This is the first report about a plasmid carrying genes coding for drug resistance and virulence in S. typhi. The data presented here suggested that novel virulence gene or related sequences, which are important in the pathogenesis of Salmonella infection could exist on pRST98.

Objective To investigate the clinical value and safety of thoracoscopic lung biopsy in the diagnosis of diffuse parenchymal lung diseases. Methods 35 patients with diffuse parenchymal lung disease underwent thoraco-scopic lung biopsy were reviewed in order to obtain clinical and pathological data. Results 31 cases were diagnosed by pathology, and the total positive diagnostic rate was 88.6 % (31/35), 10 cases as usual interstitial pneumonial (UIP), 6 cases as Tuberculosis, 4 cases as alveolar cell carcinoma, 3 cases as nonspecific interstitial pneumonia (NSIP), 3 cases as crypto-genieorganizingpneumonia (COP), 2 cases as pulmonary alveolar proteinosis (PAP), 1 case as Wegener's granulomatosis (WG), 1 case as acute interstitial pneumonia (AIP), 1 case as lymphangioleiomyomatosis (LAM). 3 cases (8.6 %) were occurred with postoperative complications, 2 cases as pulmonary infection combined with respiratory failure, 1 case as idiopathic pulmonary fibrosis with acute exacerbation, and 2 cases (5.7 %) were complicated with death. Conclusions Thoracoscopic lung biopsy is a safe and effective method which helps final di-agnosis of diffuse parenchymal lung disease.

Actinomycosis ; diagnosis ; pathology ; surgery ; Adult ; Female ; Humans ; Ovarian Diseases ; diagnosis ; pathology ; surgery

Objective To investigate the clinical viability of pre-eclampsia by measuring the level of ?-HCG in blood,blood calcium,hematocrit(HCT)and the mean arterial blood pressure(mABP).The preventive value of calcium supplement was also evaluated. Methods 356 volunteers'(16th～20th gestational weeks)were measured ?-HCG in blood,blood calcium,HCT,meanwhile mABP from the same patients.If blood ?-HCG≥50 632 IU/L,blood calcium≤2.18 mmol/L,HCT≥0.35 and mABP≥85 mm Hg(1 mm Hg=0.133 kPa),a positive conclusion was made.Women with positive results were randomly divided into test group and control group. Results 71 cases turned out to be positive in this serial test.The positive predictive value was 81.82%,negative predictive value was(97.30%),the sensitivity and specificity were 84.38% and 96.77% respectively.In the study group,the incidence of pre-eclampsia was significantly decreased as compared with the control group(P

Aim To study the pharmacokinetics of curcumin-pvp solid dispersion ig administration in mice in comparison with the free curcumin suspension.Methods Drugs were administered at a dose of 300 mg?kg-1 via ig.The plasma concentration of curcumin was determined by HPLC,the pharmacokinetics were calculated by DAS ver1.0 program.Results The curcumin pharmacokinetics conforms to a two-compartment open model after a single ig dose of curcumin solid dispersion in mice.The parameters were as follows:T12? and T12? were 16.4 and 266.1 min,respectively.AUC was 89.6 mg?L-1?min-1,Vd was 763.9 L,V1 was 51.0 L,and CL was 1.99 L?min-1.The absorption rate of curcumin solid dispersion was 6.75 times as much as curcumin suspension.Conclusion The curcumin solid dispersion improves the absorption of curcumin in vivo in mice evidently.

Objective To evaluate MR imaging of peripheral nerve tumors of the lower extremity. Methods MR imaging of peripheral nerve tumors of the lower extremity in five cases proved by surgery and pathology were retrospectively reviewed. In all patients, routine scanning was performed in axial, coronal, and sagittal planes, including T 1-weighted and T 2-weighted images. In two patients (schwannomas), T 1WI were obtained following intravenous injection of Gd-DTPA. Results There were four schwannomas (three benign and one malignant) and one malignant neurofibroma. Tumors arose at the following sites: leg ( n =2), popliteal region ( n =1), thigh ( n =1), and femoral region ( n =1). On T 1WI, tumors generally showed isointensity (two benign schwannomas) or lower-medium signal intensity to adjacent muscle with minimal inhomogeneity (one benign schwannoma, one malignant schwannoma, and one malignant neurofibroma). On T 2WI, tumors demonstrated inhomogeneous high signal intensity in all five patients. The target sign with peripheral hyperintense rim and central low intensity was see in two benign schwannomas on T 2WI. Conclusion MRI is useful in defining the location and extent of a lesion and in assisting the surgical planning. The target pattern appears to be a useful sign in the diagnosis of peripheral nerve tumors.

Objective To evaluate MR imaging of transient osteoporosis.Methods MR imaging of transient osteoporosis in eight patients was retrospectively reviewed.In all eight patients,routine scanning was performed in axial and coronal planes,including T_1-weighted and T_2-wighted images.Of the eight patients,five were male and three were female,with the age ranging from 12 to 70 years.Neither of the women was pregnant when they visited our hospital.Results The bilateral hips were affected in seven patients,the left shoulder in one.The MR images demonstrated low signal intensity in all eight patients on T_1WI,and normal signal intensity (2 cases),medium-high signal intensity (3 cases),or high signal intensity (3 cases) on T_2WI.The bone marrow edema (BME) pattern involved the acetabulum (one hip),both the femoral head in 5 hips,the femoral neck and the intertrochanteric region through the upper femur in 7 hips,and the upper humerus in one.A small joint effusion was observed in six hips on T_2WI.Conclusion MRI is useful in defining the location and extent of transient osteoporosis.