Objective To investigate CT and MRI features of abdominal huge liposarcoma,and improve the preoperative diagnostic accuracy. Methods The CT and MRI findings of 1 7 cases with abdominal huge liposarcoma proved by operation and pathology were analyzed and correlated with pathologic subtypes retrospectively.Results In 17 cases,16 cases were located in retroperitoneal,1 case was located in the abdominal cavity.The average maximal diameter of the lesions was 17 cm.In all cases,main components of well differentiated liposarcomata (n=7) were fat density on CT and MRI,and enhanced slightly,3 cases were multiple lesions,1 case of sclerosing liposarcoma contained massive patchy calcification,1 case was fatless.Myxoid liposarcoma (n=5)were similar to cystic on CT and MRI features,enhanced with latticed or cloudy components slightly to moderately .Dedifferentiated liposarcoma (n=2)has both fat and soft tissue inside and the dividing line was clear.The soft tissue mass unevenly obviously enhanced.Mixed liposarcoma (n=3)had the imaging characteristics above different types,2 cases contained no fat composition.Conclusion Liposarcoma pathological subtype has diversity,and various subtypes have certain characteristic on CT and MRI imaging features.

Objective To investigate the diagnostic value of texture analysis derived from conventional MR imaging in differentiating benign and malignant breast lesions. Methods Thirty-six patients with malignant breast lesion and 33 patients with benign breast lesion were retrospectively analyzed in our study. All patients underwent conventional MR imaging including axial T1WI, T2WI, and contrast-enhanced T1WI before surgery. Texture features were calculated from manually drawn ROIs by using MaZda software. The feature selection methods included mutual information (MI), Fishers coefficient, classification error probability combined with average correlation coefficients (POE + ACC) and the combination of the above three methods(FPM). These methods were used to identify the most significant texture features in discriminating benign breast lesion from malignant breast lesion. The statistical methods including raw data analysis (RDA), principal component analysis (PCA), linear discriminant analysis (LDA) and nonlinear discriminant analysis (NDA) were used to distinguish malignant breast lesion from benign breast lesion. The results were shown by misclassification rate. Results In the three kinds of sequences, the texture features for differentiating malignant breast lesion and benign breast lesion were mainly from T2WI which had the lowest misclassification rate 4.35%(3/69). The misclassification rates of the feature selection methods were similar in MI, Fisher coefficient and POE+ACC (15.94%to 56.52%for MI;17.39%to 56.52%for Fisher coefficient and 17.39%to 56.52%for POE+ACC). However, the misclassification rate of the combination of the three methods (4.35%to 53.62%for FPM) was lower than that of any other kind of method. In the statistical methods, NDA (4.35% to 27.54%) had lower misclassification rate than RDA (33.33% to 56.52%), PCA (33.33% to 53.62%) and LDA (15.94% to 44.93%). Conclusion Texture analysis of conventional MR imaging can provide reliably objective basis for differentiating benign from malignant breast lesions.

OBJECTIVETo evaluate the effect and complication of surgical treatment for Pilon fracture using the posterolateral approach.

METHODSFrom August 2009 to March 2011, 15 patients with Pilon fractures (2 in B3,13 in C) and with a separate displaced posterior malleolar fragment was treated in two-stage: the first stage management was on stabiliztion of the soft tissue envelope with temporary external fixator of spanning arthritis, and the second stage management was open reduction and internal fixation with posterolateral approach and anteromedial or anteralateral approach.

RESULTSAll patients were followed-up for 12 to 17 months (14.2 months in average). Thirteen of the 15 fractures healed, but 2 fractures needed autologous bone graft procedure duo to nonuion. There was no wound complication related to poterolateral incion. Fourteen fractures had less than 2 mm of incongruity of distal tibia joint. According to Baired-Jackson criteria, the results were excellent in 2 cases, good in 7, fair in 4, and poor in 2.

CONCLUSIONThe posterolateral approach offers direct visualization for the reduction and fixation of the fibula and posterior distal fragment of the tibia Pilon fractures, faciliate the management of this difficult fracture pattern.

Adult ; Female ; Fracture Fixation, Internal ; methods ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Tibial Fractures ; surgery

BACKGROUNDThe relationship between apoptosis and tumors is a major focus in cancer research. RNA interference (RNAi) technology has emerged as a very potent tool to generate cellular knockdown phenotypes of a desired gene. The aim of this study was to explore the effect of siRNA specific to the protein casein kinase 2α (CK2α) on apoptosis of laryngeal carcinoma cells and to explore possible mechanisms.

METHODSAn siRNA expression plasmid specific to CK2α, psiRNA-hH1neo-CK2α, and a non-specific siRNA expression plasmid, psiRNA-hH1neo-cont, were constructed and transfected into Hep-2 cells by a lipofectamine method. The mRNA and protein levels of CK2α in transfected cells were determined by reverse transcription-polymerase chain reaction (RT-PCR) and Western blotting analysis. Apoptosis was measured by Annexin V-fluorescein isothiocyanate (FITC)/propidium iodide (PI) double-staining methods. The morphological changes to Hep-2 cells were observed under transmission electron microscopy (TEM). The levels of Bcl-2 and Bax proteins were measured by Western blotting analysis.

RESULTSLevels of CK2α mRNA and protein were significantly decreased in the psiRNA-hH1neo-CK2α group compared to the other groups (P < 0.05). The apoptotic rate of the psiRNA-hH1neo-CK2α transfected group was significantly higher compared to that in the untransfected group and the siRNA-hH1neo-cont transfected group (25.66% ± 0.83%, 3.66% ± 0.43%, and 5.18% ± 0.22%) (P < 0.05). Compared with the untransfected group and the siRNA-hH1neo-cont transfected group, the psiRNA-hH1neo-CK2α transfected group presented with classical ultrastructural features of apoptosis, such as karyopyknosis, chromatic agglutination adjacent to the nuclear membrane, and apoptotic bodies. Compared with the other two groups, the level of Bcl-2 protein in the psiRNA-hH1neo-CK2α transfected group was decreased (0.20 ± 0.09 vs. 0.72 ± 0.16, 0.56 ± 0.11, P < 0.01), while the Bax protein level was increased (0.81 ± 0.17 vs. 0.26 ± 0.12, 0.33 ± 0.17, P < 0.01) and the ratio of Bcl-2 to Bax was decreased (0.25 ± 0.05 vs. 2.76 ± 0.21, 1.70 ± 0.22, P < 0.01).

CONCLUSIONSThe siRNA expression plasmid specific to CK2α could suppress CK2α expression and induce the apoptosis of laryngeal carcinoma cells. This is possibly by decreasing the Bcl-2/Bax ratio. CK2α may provide a potential therapeutic target against human laryngeal carcinoma.

Apoptosis ; genetics ; physiology ; Blotting, Western ; Casein Kinase II ; genetics ; Hep G2 Cells ; Humans ; Laryngeal Neoplasms ; genetics ; metabolism ; Microscopy, Electron, Transmission ; Proto-Oncogene Proteins c-bcl-2 ; genetics ; metabolism ; RNA, Small Interfering ; genetics ; physiology ; Reverse Transcriptase Polymerase Chain Reaction ; bcl-2-Associated X Protein ; genetics ; metabolism

OBJECTIVETo assess the effect of small interfering RNA (siRNA) specific to protein kinase CK2a on proliferation and apoptosis of Hep-2 cell line.

METHODSsiRNA expression plasmid psiRNA-hH1neo-CK2 specific to protein kinase CK2a and non-specific siRNA expression plasmid psiRNA-hH1neo-cont were constructed respectively, and then were transfected into Hep-2 cells by lipofectamine methods. Protein kinase CK2a mRNA and protein of the transfected cells were detected by reverse transcription polymerase chain reaction (RT-PCR) and Western Blot, respectively. Proliferation and apoptosis of the transfected cells were observed by methyl thiazolyl tetrazolium (MTT) method and flow cytometry (FCM), respectively.

RESULTSProtein kinase CK2a mRNA and protein expressions were significantly decreased in the cells transfected with psiRNA-hH1neo-CK2 (P < 0.05). The Hep-2 cells grew slowly after transfected with psiRNA-hH1neo-CK2(P < 0.05). Obvious subdiploid peaks were found in the cells transfected with psiRNA-hH1neo-CK2 (P < 0.05).

CONCLUSIONSsiRNA expression plasmid specific to protein kinase CK2a suppressed the protein kinase CK2a expression and the proliferation of Hep-2, and induced apoptosis of Hep-2 cells.

Carcinoma ; genetics ; pathology ; Casein Kinase II ; genetics ; Cell Line, Tumor ; Cell Proliferation ; Humans ; Laryngeal Neoplasms ; genetics ; pathology ; Plasmids ; RNA, Messenger ; genetics ; RNA, Small Interfering ; Transfection

OBJECTIVETo investigate the need and utilization for health services in patients with allergic rhinitis in Qingdao area.

METHODSAn investigation was conducted by the method of combining multi-stage sampling and cluster sampling. SPSS 13.0 software was used to analyse the data.

RESULTSAmong Two thousand and four hundred questionnaires, two thousand and fifty-two questionnaires were available. The effective rate was 85.5%. The total two-week prevalence in male was 6.5%, while that in female was 6.2%. There was no significant difference between male and female (χ(2) = 0.103, P > 0.05). The total ratio of those who visited doctors was 1.7%. The ratio of those who visited doctors in the first two weeks was 26.7% (35/131). 49.0% of non-users of health service thought it was unnecessary to consult a doctor because of mild symptoms. In the investigation about the allergic rhinitis, 60.2% patients (1235/2052) confessed that they heard of allergic rhinitis, 30.0% patients (616/2052) thought of allergic rhinitis was common cold.

CONCLUSIONSThe number of patients treated for allergic rhinitis was less than its prevalence. The primary reason for low attendance was that the majority of patients with mild symptoms thought it was no need to see a doctor. In order to improve the residents' health services utilization, medical education for allergic rhinitis is necessary.

Adolescent ; Adult ; Aged ; Child ; China ; epidemiology ; Female ; Health Services Needs and Demand ; Humans ; Male ; Middle Aged ; Prevalence ; Retrospective Studies ; Rhinitis, Allergic ; Rhinitis, Allergic, Perennial ; epidemiology ; Surveys and Questionnaires ; Young Adult

OBJECTIVETo evaluate the relationship between the deformation of penile artery and the primary artery erectile dysfunction, and to improve the treatment and diagnosis of primary artery erectile dysfunction.

METHODSOne case of primary artery erectile dysfunction was presented with its primary clinic data.

RESULTSThe dorsal artery of the penis was thin and the bilateral penile arteries were lacking by arteriography. The implantation of a penile prosthesis significantly improved the patient's erectile function.

CONCLUSIONThe primary artery erectile dysfunction is a relatively rare disease. The possibility of primary artery erectile dysfunction should be kept in mind. Penile prosthesis implantation is an effective means for the treatment of primary artery erectile dysfunction.

Adult ; Arteries ; abnormalities ; Humans ; Impotence, Vasculogenic ; diagnostic imaging ; physiopathology ; surgery ; Male ; Penile Implantation ; Penis ; blood supply ; diagnostic imaging ; Radiography

OBJECTIVETo investigate the survival of neural stem cell (NSC) infected by recombinant adenovirus with GFP (Ad-GFP) and the expression of GFP in normal rat cochlea and their potential effect on auditory function and cochlea structures via round window transplantation.

METHODSIn comparison with the normal rats without any transplantation (Group III), normal rat cochleae were transplanted with NSC infected with Ad-GFP (Group I) or the artificial perilymph (Group II) via round windows. Auditory functions were monitored by thresholds of auditory brain stem responses (ABR); the cochlea structures were examined by HE staining; survivals of implanted NSC were determined by the expression of GFP; survivals of hair cells were accessed by whole mount preparation.

RESULTSNeither at pre-transplantation nor at post-transplantation, there were significant differences in the click-ABR thresholds in rats between Group I and Group II (P > 0.05). There were no significant differences in these values before and after transplantation in the same rats from each group. After transplantation, the cochlea structures were normal in both Group I & Group II. Grafted NSC was visualized by the GFP expression in every turn of the cochlea in all animals of Group I. There were no significant differences in the loss of outer hair cell (OHC) among three groups. The inner hair cell (IHC) and most OHC were normal in every turns of cochleae of all groups.

CONCLUSIONSThe embryonic NSC infected with Ad-GFP could survive and express the GFP gene in normal rat cochlea after transplantation via round window, which had not obvious affection to auditory function and inner ear pathology of rat cochlea.

Adenoviridae ; genetics ; Animals ; Auditory Threshold ; Cochlea ; surgery ; Embryonic Stem Cells ; transplantation ; Evoked Potentials, Auditory, Brain Stem ; Gene Transfer Techniques ; Green Fluorescent Proteins ; genetics ; Neural Stem Cells ; transplantation ; Rats ; Rats, Sprague-Dawley ; Round Window, Ear ; surgery ; Stem Cell Transplantation ; methods

OBJECTIVETo evaluate the transduction efficiency of a recombinant adenovirus carrying the gene for green fluorescent protein (Ad-GFP) into the primary cultures of fetal neural stem cells (NSCs) by the expression of GFP.

METHODSThe Ad-GFP was constructed by homologous recombination in bacteria with the AdEasy system; NSCs were isolated from rat fetal hippocampus and cultured as neurosphere suspensions. After infection with the recombinant Ad-GFP, NSCs were examined with a fluorescent microscopy and a flow cytometry for their expression of GFP.

RESULTSAfter the viral infection, flow cytometry analysis revealed that the percentage of GFP-positive cells was as high as 97.05%. The infected NSCs sustained the GFP expression for above 4 weeks. After differentiated into astrocytes or neurons, they continued to express GFP efficiently.

CONCLUSIONWe have successfully constructed a viral vector Ad-GFP that can efficiently infect the primary NSCs. The reporter gene was showed fully and sustained expression in the infected cells as well as their differentiated progenies.

Adenoviridae ; metabolism ; Animals ; Electrophoresis, Agar Gel ; Escherichia coli ; metabolism ; Gene Transfer Techniques ; Genetic Vectors ; Green Fluorescent Proteins ; metabolism ; Hippocampus ; cytology ; Humans ; Models, Biological ; Models, Genetic ; Neurons ; cytology ; Rats ; Recombinant Proteins ; chemistry ; Stem Cells ; cytology

OBJECTIVETo evalute the efficacy of high-resolution CT(HRCT) in differential diagnosis and treatment of chronic suppurative otitis media and cholesteatoma otitis media by soft-tissue shadows.

METHODSHRCT scanning was performed in 120 cases, 153 ears, with chronic otitis suppurative media and cholesteatoma otitis media, of which original data were processed with multi-planar reconstruction (MPR) and maximum intensity projection (MIP), the characteristics of the soft-tissue shadows' growth, window width or window leveling and bony destruction were respectively observed, as well as compared with the surgery findings.

RESULTSIn 120 patients (153 ears), 109 ears were diagnosed as cholesteatoma otitis media, and 44 ears were diagnosed as chronic suppurative otitis media, among which 33 ears had granulation tissue and 11 ears had secretion. One hundred and seven ears were postoperatively diagnosed as cholesteatoma otitis media, among which 25 ears had granulation tissue. Among 46 ears of chronic suppurative otitis media, 35 ears had granulation tissue, and only 11 ears had secretion. A 98.6% diagnostic accuracy can be reached with HRCT in diagnosing cholesteatoma otitis media and chronic suppurative otitis media. The Youden's index was 0.98, 0.98 and 1.00 respectively with HRCT in diagnosing cholesteatoma, granulation tissue and secretion.

CONCLUSIONSCombination of the three different imaging methods, axial images, coronal MPR images and MIP images, can improve the efficacy of the HRCT diagnosis and definite chronic otitis media, which can be routinely used for surgery plan.

Adolescent ; Adult ; Aged ; Child ; Child, Preschool ; Cholesteatoma, Middle Ear ; diagnostic imaging ; Chronic Disease ; Female ; Humans ; Male ; Middle Aged ; Otitis Media, Suppurative ; diagnostic imaging ; Tomography, X-Ray Computed ; methods ; Young Adult