The transvaginal ultrasonography,sonohyterography and intravenous contrast-enhanced ultrasonography are main ultrasonographic methods in evaluation of endometrial lesions.This article introduces the procedures,limitations,advantages and disadvantages of these three ultrasonographic methods in differential diagnosis of benign and malignant endometrial lesions in postmenopausal women.

Abnormal expression of secreted protein acidic and rich in cysteine like 1 (SPARCL1 )gene is closely related to the development,metastasis and prognosis of a variety of tumors.Recent studies show that SPARCL1 gene is high expressed in glioma.The protein product of SPARCL1 gene encoded can interact with collagen,thus affecting the metastasis ability of tumor,which is positively correlated with tumor malignant de-gree.SPARCL1 gene is low expressed in gastric cancer,colorectal cancer,prostate cancer and breast cancer, which is negatively correlated with the invasion and metastasis abilities of tumors.At present,the role of speci-fic molecular mechanisms of SPARCL1 gene remains controversial. The expressions and functions of SPARCL1 gene in tumor tissues seem to depend on the tumor microenvironment.

The current treatment of medical implant-associated infections is still challenging.The infections are particularly persistent because the bacteria attaching to the implant surfaces produce a protective matrix which establishes itself as biofilms,shielding the bacteria from antibiotics.Biofilm bacteria are resistant to antimicrobics at levels 500 to 5,000 times higher than those needed to kill non-biofilm bacteria.In vitro experiments have shown that electric current has anti-infection effect and can enhance the activity of some antimicrobial agents against certain bacteria in the biofilms.Direct electrical stimulation has already been safely used in humans for fracture healing.In this article,we review the current state and development in research on the anti-infection effect of electrical stimulation.

Objective To analyze clinical distribution and change in drug resistance of Acinetobacter baumannii (A.baumannii)in 2009-2013,guide clinical rational antimicrobial use,and reduce healthcare-associated infection rate.Methods 919 A.baumannii isolates were isolated from inpatients and outpatients in a hospital between Janu-ary 2009 and December 2013,specimen and department sources,as well as change in drug resistance of A.bauman-nii were analyzed.Results A total of 10 273 pathogens were isolated from 2009 to 2013,the constituent ratio of A.baumannii in each year was 7.98%(n=93),11.31%(n=155),10.22%(n=185),7.73%(n=217),and 8.62%(n=269)respectively;the constituent ratio of imipenem-resistant A.baumannii was 24.73%,38.06%,71.89%, 64.52%,and 86.99% respectively;the main specimen source was sputum (83.68%);the major department sources were intensive care unit(ICU,39.28%),department of neurology (20.78%),and department of respiratory medi-cine(8.60%).The resistant rate of A.baumannii to most antimicrobial agents increased,the resistant rates to imi-penem and piperacillin/tazobactam increased from 24.73% and 4.44% in 2009 to 86.99% and 86.25% in 2013 re-spectively;resistant rate to sulphamethoxazole/trimethoprim decreased from 91.30% in 2009 to 27.14% in 2013;in 2013,except resistant rates to amikacin and sulphamethoxazole/trimethoprim were low (20.82% and 27.14%respectively),resistant rates to the other 11 kinds of antimicrobial agents were all >83.64%.Conclusion The iso-lation rate of A.baumannii is high in this hospital,the main specimen source is sputum,the main department source is ICU;antimicrobial resistant rate of A.baumannii is high,prevention and control of infection and trans-mission of A.baumannii should be strengthened.

Potential toxicities of three classes of dyes and pigments were introduced in this review. Some azo/benzidine dyes, anthraquinone dyes and triarylmethane dyes have carcinogenicity,some azo/benzidine dyes and anthraquinone dyes may cause skin irritation, some noncarcinogenic triarylmethane dyes have risk of serious damage to eyes and may exert long term adverse effects on the aquatic environment.

Objective To explore the correlation between gene HLA-class I polymorphism and susceptibility to leukemia in Chinese Gansu Han people and search for the genes susceptible to leukemia.Methods HLA-A and B alleles polymorphism in 65 patients with leukemia and 48 normal subjects were determined by PCR with sequence specific oligucleotide probe(PCR-SSO).Results The allele frequencies of HLA-A01 and B38 were increased (P