Nineteen cases of cardiac myxoma were studied immunohistochemically in order to elucidate the histogenesis of the tumor.It was found that the blood vessels and the stromal cells of all the tumors were positive to vimentin.the matured endothelial cells of blood vessels were positive to UEA.the stromal cells and the smooth muscle cells of blood vessels of a part of the tumors were positive or weak-positive to desmin or myosin.a part of the tumor cells of several myxomas were weak-positive or positive to S-100 protein,and the epithelial markers of AE1 and AE3 were negative in all the cardiac myxomas.Our study revealed that there were various kinds of mesenchymal cells in cardiac myxomas and they might originate from multipotential primeval mesenchymal tissues.The difference of im-munohistochemical reactions of tumor cells reflects the difference of the maturity and differentiation of the tumor tissues.The histopathology and histochemistry of cardiac myxoma were also observed and analyzed.

Objective To investigate the changes of pathogens distribution and antimicrobial resistance in children with urinary tract infection (UTI) in 10 years. Methods The results of urine culture and drug sensitivity in children with UTI from January 2001 to December 2003, and from January 2011 to December 2013 were retrospectively analyzed.Results In recent 10 years, there was no obvious change in the ratio of gram-negative bacteria to gram-positive bacteria. Escherichia coli was still the main bacteria causing UTI in children. The detection rate of enterococcus was signiifcantly increased from 18.3%in 2011-2013 to 7.5%in 2001-2003 (P<0.05) and it had become the second pathogenic bacteria. The isolation rate of ESBLs producing strains was signiifcantly higher in 2011-2013 than in 2001-2003 (P<0.05). The rate of Escherichia coli sensitive to imipenem re-mained at 100%and it is also sensitive to enzyme inhibitors antibiotics and nitrofuranto. Sensitivities to antibiotics were changed in different species of enterococcus. Conclusions The distribution of pathogens and antimicrobial resistance in children with UTI are constantly changing. The clinician should pay close attention to changes of epidemiology in the region and hospital and rational use of antimicrobial drugs.

The clinical and pathological materials of 83 cases of prostatic carcinoma (PC) were reviewed retrospectively and the tissue specimens of PC were marked with prostate-specific antigen (PSA). According to the criteria of Dhom's classification of prostatic carcinoma. 66 cases out of the 83 (79. 5%) were of the common variety of PC, 14 cases (10. 9%) were of the rare variety and 3 cases (3. 6%) could not be classified with Dhom's method. Among the 66 cases of common prostatic carcinoma, 41 cases (49. 4%) exhibited a pathological structure of u-riiforrn pattern and 25 cases (30. 1%) of pluriform pattern. Well-differentiated adenocarcinoma, cribriform carcinoma and carcinoid of the prostate were strongly positive to PSA marking; poorly-differentiated adenocarcinoma and almost all the prostatic carcinomas of the rare variety and with the structure of pluriform pattern were positive or weakly positive; undifferentiated solid carcinoma and small cell carcinoma were very weakly positive; and squamous cell carcinoma was negative. In addition, other methods for the pathological classification of prostatic carcinoma used currently at home and abroad were compared and discussed.

Objective To observe the short-term and long-term effect of preventive therapy of bionic pulsed electromagnetic fields(BEMF) on the osteoporosis model of Wistar rats.Methods Thirty-two 3-month-old female Wistar rats were randomly divided into 4 groups with 8 rats in each group: control group(group A),desamethasone group(group B),calcitonin group(group C) and BEMF group(group D).Rats in group A were raised normally and received normal saline.Rats in group B were injected with desamethasone only(1 mg/kg,intramuscularly,twice a week).Rats in group C were injected with calcitonin(2 IU/kg,subcutaneously,once a day) and rats in group D were irradiated with BEMF for preventive therapy,simultaneouly all rats were injected with desamethasone(1 mg/kg,intramuscularly,twice a week).The rat bone mineral density(BMD) was measured under narcosis at 4,8,12 weeks after starting preventive therapy.Results No significant differences in BMD were found among all groups 4 weeks later.The significant differences in BMD were observed between group D and group B 8 weeks later and lasted to 12 weeks(P

ObjectiveTo explore the relationship among 25-hydroxyvitamin D,serum calcium,calcium-sensing receptor,and breast cancer. Methods The expressions of calcium-sensing receptor (CaSR) in primary breast cancer,breast benign tumors,and normal breast tissue beside tumors were determined by immunohistochemistry S-P method as well as the concentration of serum 25 (OH) D and serum calcium in breast cancer and breast benign tumors by Enzyme-linked immunosorbent assay (ELISA),Tribromoarsenazo Ⅲ method.ResultsSerum 25 (OH) D level of breast cancer was significantly lower than the breast benign tumors [ (34.13 ± 14.14) nmol/L vs (50.29 ± 25.65 ) nmol/L,t =2.870,P =0.001 ].Serum level of 25 ( OH ) D in lymph node metastasis positive patient was lower than that in negative group [ (30.8 ± 9.71 ) nmol/L vs (43.7 ± 23.59) nmol/L,t =2.467,P =0.021 ].The positive expression of CaSR in breast cancer(88.9％ )was higher than breast benign tumors(60％,x2 =6.717,P ＜ 0.01 ) and normal breast tissue beside tumors (60％,x2 =5.628,P ＜ 0.05 ).ConclusionsConcentration of serum 25 (OH)D and expression of calcium-sensing receptor in the tissues may be associated with occurrence,development and prognosis of breast cancer.

Objective To observe the osteogenic effect of tissue-engineered bone constructed by poly-L-lysine-demineralized bone matrix (PLL-DBM) enriched bone marrow stem cells in the space of goat transverse process bone fusion model and explore a new tissue-engineered bone construction method. Methods PLL was used to decorate goat DBM to prepare a matrix material (PLL-DBM). The osteo-genic effect of tissue-engineered bone constructed by PLL-DBM enriched bone marrow cells ( Group Ⅰ A) was detected in goat lumbar intertransverse graft bone model; autogenous iliac bone (Group Ⅰ B), DBM enriched bone marrow (Group Ⅱ C) and DBM (Group Ⅱ D) were used as controls. The osteogenesis of the bones in the fused segments of four groups were compared and evaluated by X-ray, three-dimensional CT, CT value testing and biomechanical testing. Results The results of X-ray showed that the fusion ranges in groups ⅠA and ⅠB were basically the same, which were significantly wider than that in Group Ⅱ, with no fusion detected in Group Ⅱ D. The CT value was (696.76±10275) HU in Group Ⅰ A and (766.03±69.24) HU in Group B, which were significantly higher than that in Group Ⅱ C (P <0.05), but there was no statistical difference in CT value between Groups Ⅰ A and Ⅰ B (P > 0.05). The CT val-ue in Group Ⅱ C was significantly higher than in Group ⅡD (P <0.01). There was no statistical differ-ence between Groups Ⅰ A and Ⅰ B in the maximum load and bending strength (P > 0.05). The maxi-mum load and bending strength in Groups Ⅰ A and Ⅰ B were significantly higher than that in Group Ⅱ C (P < 0.05), and the two indices in Group Ⅱ C were significantly higher than that in Group Ⅱ D (P <0.01). Conclusion Tissue-engineered bone constructed by PLL-DBM enriched bone marrow cells is an ideal tissue engineered bone and its osteogenic potential is similar to that of autologous bone.

Objective To retrospectively analyse the clinical data of off-pump coronary artery bypass grafting surgery(OPCAB)in our department and summarize the clinical experience of peri-operative management.Methods From January 2007 to May 2008,253 patients underwent OPCAB.Seventy-six cases with left main disease(including 18 cases of single left main lesion and 58 cases of complex lesion);13 cases had single vessel disease;32 cases had double vessels disease and 190 cases had triple vessels disease.Eighteen cases received emergency OPCAB.All vessel anastomosis were performed with coronary artery stablizer and shunt through median sternotomy.Resuits Three cases died after operation(1.2%).Intra-aortic balloon pump was used in 11 cases.Mechanical ventilation time was 3-168 h[(24.1±22.3)h],and ICU stay time was 1-14 day[(2.8±2.0)d].Postoperative hospital stay time was 8-42 days[(15.6±6.3)d].Conclusion OPCAB is reliable for most bypass cases.With appropilate peri-operative management,a satisfied result will be acceptable.

Objective To use tri-operator breast blood oxygen imaging in diagnosis of early stage breast cancer.Methods To analysis and diagnosis eighty cases with the technology of breast blood oxygen imaging.Results The accurate rate of the diagnosis made by technology of breast blood oxygen imaging was 93.75%,the sensitivity of diagnosis was 90.63%,the specificity was 95.83%.Conclusions The technology of breast blood oxygen imaging without the radiation may be a better methods to diagnosis the breast diseases,which has the higher sensitivity than infrared rays examination on breast cancer diagnosis.

Anti-Bacterial Agents ; therapeutic use ; Drainage ; External Fixators ; Female ; Fracture Fixation ; methods ; Fracture Fixation, Internal ; adverse effects ; Fractures, Open ; surgery ; Humans ; Male ; Microsurgery ; Soft Tissue Injuries ; surgery ; Surgical Flaps ; Surgical Wound Infection ; therapy ; Tibial Fractures ; surgery ; Treatment Outcome

AIM: To investigate the ocular complication after radiation therapy for nasopharyngeal carcinoma(NPC).METHODS: The authors performed a previous study on keratopathy in 213 NPC patients who received first stage radiation and had at least 10 months of follow-up. These patients were categorized into three groups depending on NPC clinic stages. Rates and proportions of keratopathy occurring in these groups were compared and analyzed with Chi-square Test and Spearman rank correlation coefficient.RESULTS: Radiation keratopathy developed in 19 patients, about 8.9% (19/213). The latency value was 3 to 30days. The effect of NPC clinic stages and radiation did on the development of keratopathy was not statistically significant (P＞0.05).CONCLUSION: The NPC clinic stages and radiation doses plays few effects on the development of keratopathy. It may play a key role that corneal nerves damage induced ocular surface diseases. It can not be excluded that individuals have different sensitivities to radiation.