OBJECTIVETo investigate the role of transrectal real-time tissue elastography (TRTE) in the diagnosis of prostate cancer (PCa).

METHODSEighty-four patients with suspected PCa and scheduled for prostate biopsies underwent TRTE, digital rectal examination (DRE), transrectal ultrasonography (TRUS), and magnetic resonance imaging (MRI). The findings of TRTE were compared with those of other examinations and pathological findings.

RESULTSOf these 84 patients, 36 had benign lesions and 48 had PCa. The diagnostic sensitivity, specificity, accuracy, positive predictive value and negative predictive value were 91.7%, 72.2%, 83.3%, 81.5%, and 86.7% for TRTE and 85.4%ì63.9%ì76.2%, 75.9%, and 76.7% for TRUS (P>0.05), while its specificity (72.2%) was significantly higher than that of MRI (44.4%) (P=0.03). The TRTE findings were not significantly correlated with the pathological findings and serum total prostate specific antigen (P>0.05), and the diagnostic sensitivity of TRTE decreased along with the enlargement of prostate. However, the diagnostic specificity of TRTE was higher than MRI for nodules with soft to medium texture (P=0.04).For PCa, the diagnostic sensitivity of TRTE increased when the Gleanson scores of tumors increased (P<0.05).

CONCLUSIONTRTE can be used as a diagnostic test to supplement clinical diagnosis of PCa.

Adult ; Aged ; Aged, 80 and over ; Elasticity Imaging Techniques ; methods ; Humans ; Male ; Middle Aged ; Predictive Value of Tests ; Prostatic Neoplasms ; diagnostic imaging ; Rectum ; diagnostic imaging ; Sensitivity and Specificity

OBJECTIVETo develop a predictive nomogram for predicting the prostate carcinoma among Chinese population.

METHODSTotally 556 Chinese male patients who had undergone an initial prostate biopsy in our hospital from July 2004 to February 2009 were enrolled in this study. Variables including age, volume, prostate specific antigen (PSA) level, and free PSA (f-PSA)/total PSA (t-PSA) were collected. Logistic regression analysis was performed to estimate the relative risk. Regression equation was established for variables via stepwise regression, via which a nomogram for assessing the positive biopsy results was established, and then the predictive value of this nomogram was evaluated using receiver area under curve (ROC) analysis.

RESULTSOf these 556 patients, cancer was detected in 205 patients (36.87%) via biopsies. Univariate analysis showed that age, prostate volume, PSA levels, and f-PSA/t-PSA were the influencing factors of the nomogram. The risk model performed well in an independent sample, with an AUC(ROC) of 0.8767, which was significantly larger than that of the prediction based on age (AUC(ROC) : 0.6397), prostate volume (AUC(ROC) : 0.7255), PSA (AUC(ROC) : 0.7111), or f-PSA/t-PSA (AUC(ROC) : 0.6973) alone.

CONCLUSIONA preliminary nomogram with high predictive value for Chinese population was successfully established.

Aged ; Aged, 80 and over ; Area Under Curve ; Asian Continental Ancestry Group ; Biopsy, Needle ; Humans ; Male ; Middle Aged ; Nomograms ; Prostate ; pathology ; Prostatic Neoplasms ; diagnosis ; pathology ; ROC Curve

OBJECTIVETo evaluate autogenous vein grafts and inside-out vein grafts as conduits for the defects repair in the rabbit facial nerves.

METHODSThe 10 mm segments of buccal division of facial nerve were transected for 48 rabbits in this study. Then the gaps were immediately repaired by autogenous vein grafts or inside-out vein grafts in different groups. All the animals underwent the whisker movement test and electrophysiologic test during the following 16 weeks at different time points postoperatively. Subsequently, the histological examination was performed to observe the facial nerve regeneration morphologically.

RESULTSAt 8 weeks after operation, the facial nerve regeneration has significant difference between the experimental group and the control group in electrophysiologic test and histological observation. However, at the end of this study, 16 weeks after operation, there was no significant difference between inside-out vein grafts and standard vein grafts in enhancing peripheral nerve regeneration.

CONCLUSIONThis study suggest that both kinds of vein grafts play positive roles in facial nerve regeneration after being repaired immediately, but the autogenous inside-out vein grafts might accelerate and facilitate axonal regeneration as compared with control.

Animals ; Axons ; physiology ; Facial Nerve ; physiology ; surgery ; Facial Nerve Injuries ; surgery ; Male ; Nerve Regeneration ; physiology ; Rabbits ; Transplantation, Autologous ; methods ; Veins ; transplantation

OBJECTIVETo develop a nomogram for predicting the probability of prostate cancer at transrectal ultrasound-guided repeat prostate biopsy in Chinese men.

METHODSWe performed repeat biopsy for 170 patients with benign prostate diseases diagnosed on the first biopsy, and analyzed the correlation of positive repeat biopsy with age, prostate volume, PSA, free-to-total PSA (f-PSA/t-PSA), PSA velocity, PSA density, results of digital rectal examination (DRE) and previous histology. We entered the variables stepwise into logistic regression models, and established a nomogram for the risk score on the probability of positive repeat biopsy, whose predictive value was assessed by receiver operating characteristic (ROC) analysis.

RESULTSProstate cancer was detected in 31.8% of the repeat biopsies (54/170). The most accurate predictive nomogram comprised age, PSA, f-PSA/t-PSA, PSA velocity, prostate volume, DRE and previous prostatic intraepithelial neoplasia (PIN) findings. The nomogram exhibited a high predictive value, with the area under the ROC curve (AUC) of 82.4%, significantly greater than that of the prediction based on PSA density (AUC: 66.9%), prostate volume (AUC: 72.6%), PSA velocity (AUC: 69.6%), f-PSA/t-PSA (AUC: 69.3%), or DRE (AUC: 58.5% ) alone.

CONCLUSIONThe nomogram is an accurate multi-variable predicting tool to determine the probability of positive repeat prostate biopsy.

Aged ; Aged, 80 and over ; Area Under Curve ; Asian Continental Ancestry Group ; Biopsy, Needle ; methods ; Humans ; Logistic Models ; Male ; Middle Aged ; Nomograms ; Predictive Value of Tests ; Prostate ; pathology ; Prostatic Diseases ; pathology ; Prostatic Neoplasms ; diagnosis ; diagnostic imaging ; ROC Curve ; Ultrasonography

OBJECTIVETo evaluate transrectal ultrasound-guided systematic 12-core biopsy of the prostate for the detection and characterization of prostate cancer in different age and prostate specific antigen (PSA) groups.

METHODSTotally 210 patients were divided into four age groups (< or = 59 yr, 60-69 yr, 70-79 yr, and > or = 80 yr) and five PSA groups (0-4 microg/L, 4.1-10 microg/L, 10.1 -20 microg/L, 20.1-50 microg/L, and > 50 microg/L), and underwent transrectal ultrasound-guided systematic 12-core biopsy of the prostate at various sites for detecting prostate cancer. Clinical data and the results of various biopsy schemes were analyzed and compared.

RESULTSNinety-one cases of prostate cancer were detected among the 210 patients, with a total detection rate of 43.3%, and the percentage was higher with the increase of age and PSA level. Larger and higher-grade tumors were associated with older age and higher PSA level, and higher detection rates were related to laterally directed and apical biopsies. The 12-core biopsy outperformed other biopsy schemes in detecting prostate cancer in patients under 60 years of age and with PSA < 20 microg/L.

CONCLUSIONThe 12-core biopsy scheme can make up for the inadequacy of sextant biopsy in detecting prostate cancer, and less influenced by the age and PSA level of the patients. Generally larger and higher-grade tumors are associated with older age and higher PSA level.

Adult ; Aged ; Aged, 80 and over ; Biopsy, Needle ; methods ; Humans ; Male ; Middle Aged ; Prostate ; diagnostic imaging ; Prostate-Specific Antigen ; metabolism ; Prostatic Neoplasms ; diagnostic imaging ; pathology ; Ultrasonography

OBJECTIVETo investigate the role of contrast-enhanced ultrasound in the differential diagnosis of high- and low-grade urothelial carcinoma.

METHODSThe radiological data of 96 patients with urothelial carcinomas who had undergone gray-scale contrast-enhanced ultrasound from August 2010 to April 2011 were analyzed retrospectively. Pathological examination demonstrated that the tumors were high-grade in 55 cases (high-grade group) and low-grade in 41 cases (low-grade group). The dynamic images were analyzed by time-intensity curve, and the arrival time (AT), peak intensity (PI), time to peak (TTP), and washout time (WT) were measured. The enhancement patterns of different urothelial carcinomas were analyzed.

RESULTSBoth PI (P=0.005) and WT (P=0.002) were significantly higher in high-grade group than in low-grade group, whereas AT (P=0.374) and TTP (P=0.386) showed no significant difference between these two groups. In the high-grade group, 47 cases (85.5%) were identified as fast wash-in and slow wash-out; in the low-grade group, 35 (85.4%) were identified as fast wash-in and fast wash-out. When the enhancement pattern was used as a diagnostic indicator for differentiating urothelial carcinomas, the sensitivity, specificity, accuracy, positive predictive value, and negative predictive value were 85.5%, 90.2%, 87.5%, 92.2%, and 82.2% for high-grade tumor and 85.4%, 90.9%, 88.5%, 87.5%, and 89.3% for low-grade tumor.

CONCLUSIONSDifferent grade urothelial carcinomas show different enhancement finding on contrast-enhanced ultrasound. The enhancement pattern can serve as an important diagnostic indicator.

Aged ; Aged, 80 and over ; Carcinoma ; diagnostic imaging ; Diagnosis, Differential ; Female ; Humans ; Male ; Middle Aged ; Sensitivity and Specificity ; Ultrasonography ; Urologic Neoplasms ; diagnostic imaging

OBJECTIVETo investigate the value of strain index (SI) by transrectal real-time tissue elastography (TRTE) for differentiation of the prostate peripheral zone lesions.

METHODSTotally 83 patients with suspected prostate cancer underwent the quantitative analysis by TRTE examination. The SI of total lesions (ASI) and peak elasticity in lesion (PSI) were calculated, and the pathologic findings were compared. Then the values of ASI and PSI in the differential diagnosis of prostate lesions were assessed. The influence of Gleanson scores on SI was evaluated.

RESULTSThe area under the Receiver Operating Characteristic curves (or ROC curves) of ASI and PSI were 0.62 (P=0.06) and 0.92 (P=0.00) respectively for the differential diagnosis of prostate peripheral lesions. When a cutoff point of 17.44 was used,PSI had a sensitivity of 74.5% and a specificity of 83.3%. Gleason scores showed no significant difference between PSIü 17.44 group and PSIþ17.44 group ( P>0.05).

CONCLUSIONPSI is helpful for the differential diagnosis of prostate peripheral zone lesions.

Aged ; Aged, 80 and over ; Diagnosis, Differential ; Elasticity Imaging Techniques ; Humans ; Male ; Middle Aged ; Prostate ; diagnostic imaging ; Prostatic Neoplasms ; diagnostic imaging ; Sensitivity and Specificity

OBJECTIVETo investigate the spectrum of bacteria and fungi in different sites in severe acute pancreatitis (SAP).

METHODSThe prospective study was performed in 205 patients with SAP treated from January 2000 to December 2008. The Infection rate of bacteria and fungi was observed prospectively in pancreatic necrosis and(or) pus form abdomen, body fluids and deep vein catheter in SAP. Body fluids and pancreatic necrosis were cultured twice a week. Central venous catheter was cultured when it had been placed for two weeks. Blood was cultured for bacteria and fungi when body temperature was more than 39 degrees C. Constituent ratio of bacteria and fungi was observed in different sites and in all sites within 28 days after onset of SAP.

RESULTSThere were 937 pathogens, among which infection rates of gram-negative bacteria was higher than gram-positive bacteria and fungi (P < 0.05), the infection rates of gam-positive bacteria and fungi were similar. Infection rates of gram-negative bacteria in pancreatic necrosis (55.2%), bile (55.4%), blood (68.1%) and central venous catheter (44.4%) were increased significantly (P < 0.05) compared with gram-positive bacteria and (30.2%, 33.9%, 23.4%, 38.9%) and fungi (14.6%, 10.7%, 8.5%, 16.7%); however, infection rate of fungi (59.6%) was increased significantly (P < 0.05) compared with gram-negative bacteria (24.0%) and gram-positive bacteria (16.3%) in urine; infection rate of gram-negative bacteria (53.2%) was significantly higher (P < 0.05) than that of fungi (27.1%) and gram-positive bacteria (19.7%) in sputum. Infection rate of non-zymogenic bacteria (Pseudomonas aeruginosa, Acinetobacter baumannii and Stenotrophomonas maltophilia) in gram-negative bacteria in pancreatic necrosis, bile, blood, central venous catheter and sputum was significantly higher than that of zymogenic bacteria (Klebsiella pneumoniae, Escherichia coli and Enterobacter cloacae) (P < 0.01); infection rate of zymogenic bacteria (Klebsiella pneumoniae, Escherichia coli) was higher significantly (P < 0.01) than that of non-zymogenic bacteria (Pseudomonas aeruginosa, Acinetobacter baumannii). Infection rate of staphylococcus aureus, Staphylococcus epidermidis and Staphylococcus haemolyticus was significantly higher (P < 0.05) than that of Enterococcus faecalis and Enterococcus faecium in pancreatic necrosis and sputum;but infection rate of Enterococcus faecium in bile and urine was significantly higher than other gram-positive bacteria (P < 0.05). There was not difference among gram-positive bacteria;however, infection rate of Staphylococcus epidermidis in central venous catheter was increased significantly (P < 0.05). Infection rate of candida mycoderma in pancreatic necrosis, bile, urine and sputum was significantly higher than that of tricho bacteria (P < 0.05). The peak of infection rate of microbes in body fluid was within 2 to 3 weeks.

CONCLUSIONSConstituent ratio in gram-negative, gram-positive bacteria and fungi as well as their species in different sites is diverse. The peak of infection rate of microbes is 2 to 3 weeks after onset of the disease.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Bacteria ; isolation & purification ; Female ; Fungi ; isolation & purification ; Humans ; Male ; Middle Aged ; Pancreatitis ; microbiology ; Prospective Studies ; Young Adult

OBJECTIVETo investigate the relationship between tea consumption, biliary tract cancers and gallstone disease.

METHODSA population-based case-control study was conducted in urban Shanghai from 1 June 1997 to 31 May 2001 involving interviews with 627 new cases of biliary tract cancers (including 368 cases of gallbladder cancer, 191 cases of extrahepatic bile duct cancer and 68 cases of cancer of the ampulla of Vater) aged 35 to 74 years and 959 population controls frequency-matched to cases by gender and age in five-year group. 1037 patients of gallstone disease were selected from the same hospital. All subjects were interviewed in person by trained interviewers by use of a structured questionnaire. Unconditional logistic regression analysis was used to calculate adjusted odds ratio (OR) and 95% confidence interval (CI).

RESULTSCompared with tea non-drinkers, current tea consumption was inversely associated with risk of gallbladder cancer, extrahepatic bile duct cancer and gallstone disease among females with OR of 0.57 (95% CI: 0.34-0.96), 0.53 (95% CI: 0.27-1.03) and 0.71 (95% CI: 0.51-0.99), respectively. OR declined with younger age at initiation of tea drinking and with longer duration of tea consumption (P for trend < 0.05). Among males, the corresponding OR were mostly below one, although not statistically significant.

CONCLUSIONTea consumption may decrease the risk of cancers of the gallbladder and extrahepatic bile duct among females. The protective effect appears to be independent of gallstone disease.

Adult ; Aged ; Bile Ducts, Extrahepatic ; Biliary Tract Neoplasms ; epidemiology ; etiology ; Case-Control Studies ; China ; epidemiology ; Female ; Flavonoids ; pharmacology ; Gallbladder Neoplasms ; epidemiology ; etiology ; Gallstones ; epidemiology ; etiology ; Humans ; Male ; Middle Aged ; Phenols ; pharmacology ; Polyphenols ; Protective Agents ; pharmacology ; Risk Factors ; Tea ; chemistry

OBJECTIVETo establish the restriction fragment differential display-polymerase chain reaction (RFDD-PCR) as an efficient technique for constructing and studying the gene expression profile of human tissues.

METHODSThe tissues of mamma adenocarcinoma (T), cancerometastasis lymph node (L) and normal mammary (N) from one mammary infiltrating ductal carcinoma case were collected, and the gene expression profile of each kind of tissue was constructed using RFDD-PCR technique at equal pace according to the operating manual of Qbio-gene Company. Then all fragments of the three gene expression profiles were separated and displayed by electrophoresis. With the use of gene database at the website http://www.Qbio-gene.com/display, the authors identified the names of the probable fragments by bioinformatics analysis. Through comparison of the three profiles, the numbers and types of most differentially expressed gene fragments were displayed.

RESULTSThe expression profiles of the three kinds of tissue have been constructed covering 1716 fragments of mammary adenocarcinoma, 1769 of cancerometastasis lymph nodes and 1922 of normal mammary tissue. Among these 5407 fragments, 39.39% were exactly the same. While 33.9% sequences of T and L showed differences in abundance or presence, 40.9% of T and N and 39.6% fragments of L and N were observed differentially expressed. These differentially expressed gene fragments were found to relate with metastasis, differentiation, inflammation and so on.

CONCLUSIONRFDD-PCR is an efficient technique for research in human diseases genomics as a mass screening for complete gene expression profile with high-flux. Through comparison among three or more profiles, the screening for candidate genes of a certain disease can be accomplished, and there is probably a chance to identify novel gene or expressed sequence tag.

Adenocarcinoma ; genetics ; Breast Neoplasms ; genetics ; Carcinoma, Ductal, Breast ; genetics ; Computational Biology ; Electrophoresis ; methods ; Female ; Gene Expression Profiling ; methods ; Humans ; Polymerase Chain Reaction ; methods ; Sequence Analysis, DNA ; methods