Objective To evaluate the clinical value of 99Tcm-MIBI SPECT for the differential diagnosis of parotid tumors before treatment.Methods 99Tcm-MIBI SPECT imaging of the parotid region was obtained in 32 patients with parotid tumors before surgery.Early and delayed 99Tcm-MIBI imaging were performed in all patients and the diagnosis was confirmed by pathological results after surgery.The ratio of radioactivity between the tumor and opposite side of normal parotid tissue (T/N) was measured.Fisher exact probability test and t test were used for statistical analysis.Results The sensitivity,specificity and accuracy of 99Tcm-MIBI SPECT imaging for the differential diagnosis of parotid tumor were 90.00％ (9/10),86.36％ (19/22) and 87.50％ (28/32),respectively.Among 22 patients who had benign tumors,19(86.36％) showed negative findings,and the other 3 ( 13.64％ ) patients showed false positive results.In 10 patients with malignant tumors,1 ( 10.00％ ) had false negative findings,and all the other 9 (90.00％)patients showed positive results.The difference between the benign and malignant groups was statistically significant (P =0.00018 ).In the early images,the T/N ratios of benign and malignant parotid tumors were 1.45 ±0.38 and 1.65 ±0.63 (t =20.4,P＜0.01),respectively; and in the delayed images,the ratios were 1.43 ± 0.56 and 1.77 ± 0.59 ( t =2.4,P ＜ 0.05 ),respectively.Conclusion 99Tcm-MIBI SPECT imaging might be useful for the differential diagnosis of parotid tumors before surgery.

Germany ; Hazardous Substances ; analysis ; Workplace

Stem cells are characterized by self-renewing, multipotent differentiation, and high proliferation and receiving more and more attention for their roles in the development and management of various diseases. There are epithelial stem cells and mesenchymal stem cells in the prostate. The markers of the epithelial stem cells include cytokeratin, stem cell antigen-1, and integrins alpha2beta1, CD49f, CD133, CD117, and CD44. The markers of the mesenchymal stem cells include CD30, CD44, CD133, neuron-specific enolase, and vascular endothelial growth factor receptor-1. Prostate stem cells are involved in the development and treatment of prostatic diseases. This review focuses on the latest progress in the studies of prostate stem cells.
Antigens, CD ; Biomarkers ; Cell Differentiation ; Humans ; Integrin alpha2beta1 ; Male ; Prostate ; cytology ; Stem Cells ; chemistry ; cytology ; Vascular Endothelial Growth Factor A

Hospital business process optimization and reengineering is an effective method and channel for hospitals to enhance medical and management quality, realize cost minimization, improve efficiency, and increase benefits. The paper gives an account of the theories, methods, steps, relevant techniques, and tools of hospital business process optimization and reengineering, discusses the systematic framework for hospital business process improvement and key success factors and obstacles for hospital business process reengineering, analyzes the relationship of business process reengineering with hospital organizational structures and hospital information systems, and puts forward assessment criteria for hospital business process optimization and reengineering.

With the development of the medical imageology, the lumbar pain resulted from vertebral compression of the anterior column can be treated through percutaneous vertebroplasty (PV). PV has some advantages, such as short operative time, definite pain release, less complications and better security. However, there are some indications and contraindications in PV. PV can reach the prospective effect after handling these indications and contraindications. The authors reviewed the predominance, anatomy, indications, contraindications, assessment before the operation, operative methods, complications of PV in this article.

Objective To evaluate the anti-tumour effect of 60℃ LipiodoI in the embolization of VX_2 hepatocarcinoma in rabbits.Methods VX_2 carcinoma cells were surgically implanted into the left liver lobe in 30 male New Zealand white rabbits,which were randomly divided into 3 groups by figure and table method with 10 rabbits in each group.Physiological saline,Lipiodol(37℃),and Lipiodol(60℃)were injected in each group via hepatic artery and liver cancer was embolized.The volume of tumour and serum level of aspartate aminotransferase(AST)were observed after one week,and the survival period of VX_2 rabbits was also observed.Results In the group of Lipiodol(60℃),the growth rate of tumour(0.92? 0.21)was significantly lower than that of control group(3.48?1.17)and Lipiodol(37℃)groups (1.69?0.26),respectively(F=34.95,P0.05),but was significantly higher than the control group(68.6?6.6)U/L(t=19.24,P

AIM:To study the differences of basic fibroblast growth factor(bFGF)gene expression in lens epithelial cells (LECs) between fetuses and cataract patients. METHODS: In situ hybridization was used to detect bFGF mRNA in the LECs that were cultured and in tissue sections from fetuses and in the LECs from the anterior capsule of cataract patients. Image analysis was used for the relative quantitative analysis of bFGF mRNA. RESULTS: bFGF gene existed in the LECs that were cultured and in tissue sections from fetuses and in the LECs from the anterior capsule of cataract patients. The integral absorbance for the fetal cultured cells, the fetal tissue sections and the capsule membrane cells of cataract patients were 627.1±268.7, 131.5±42.8 and 79.2±26.3 respectively. The integral absorbance of fetal cultured LECs was significantly higher than that of fetal section LECs (P<0.01). The integral absorbance of cataract LECs was significantly lower than that of fetal LECs (P<0.01). CONCLUSION: The in vitro culture of LECs can improve bFGF gene expression. The bFGF gene expression in fetal LECs is significantly higher than that in cataract LECs.

By analyzing scientific research misconduct and its causes,this paper revealed the conflicts between interests of researchers and management,and proposed measures and suggestions to construct scientific integrity system in Chinese institutions by drawing on experiences from Australia、UK and America.

Catheter Ablation ; methods ; Humans ; Hypertension ; surgery ; Renal Artery ; Sympathectomy ; methods

Objective In order to provide the basis for establishment of food allergy models , we compared the differences of sensitivity and alterations of intestinal flora of food allergy models in two strains of mice .Methods Forty 4-5-week old female BALB/c and Kunmimg mice were divided into control group ( n=10) and food allergy goup ( n=30), respectively.Ovalbumin (OVA) was injected to the mice to establish food allergy models .Serum OVA-specific IgE of the mice was assayed by ELISA .The jejunum tissue was examined by pathology with HE staining .The changes of fecal flora were detected by denaturing gradient gel electrophoresis (DGGE).Results (1)Among the sensitized 60 mice, OVA-sIgE levels were significantly increased in 27/30 BALB/c mice and 21/30 KM mice compared with those of control groups(P<0.001).Moreover, there were more evident inflammatory cell infiltration , epithelial cell shedding and cytolysis in the jejunal villi of BALB/c mice than those of KM mice.(2) After food allergy modeling, there were significant changes of intestinal flora in the BALB/c mice (P<0.001), while only significant change of evenness was found in the KM mice (P<0.05).(3)There were changes of abundance , Shannon index and evenness of intestinal flora in the model groups of BALB/c and KM mice.Conclusions BALB/c mice are more sensitive to OVA allergy than KM mice .The composition of intestinal flora is different among different strains of mice .The changes of intestinal flora after OVA challenge in BALB /c mice are more obvious than those in KM mice .