Objective:To explore the diagnostic value of 68Ga-prostate specific membrane antigen (PSMA)-11 PET/MR multiparameter multimodal functional imaging in the diagnosis of naive prostate cancer (PCa), and to analyze its efficacy in the early stages of PCa. Methods:From July to September 2019, 45 suspected or pathologically confirmed PCa patients (average age: 69 years) who met the inclusion criteria were collected to perform 68Ga-PSMA-11 PET/MR examination in Nanjing First Hospital. After the scanning was completed, the method of region of interest (ROI) was used to semi-quantitatively calculate the tumor radioactive uptake in the fusion image, including the maximum standardized uptake value (SUV max), tumor metabolic volume (MTV) and mean standardized uptake value (SUV mean), and PSMA expression load was calculated(SUV mean×MTV). Apparent diffusion coefficient (ADC) values of ROI were measured in ADC images ( b=1 500 s/mm 2). The efficacy of 68Ga-PSMA-11 PET/MR in the preoperative diagnosis of PCa and the effect on clinical staging were evaluated with the pathological results. The correlation between prostate specific antigen (PSA) and radiation uptake in PCa tissues, PSMA expression load and ADC values was analyzed by Pearson correlation. Independent-sample t test was used to analyze the data. Results:Pathologically, 38 of the 45 patients were with PCa and 7 patients had benign prostatic hypertrophy (BPH), and metastasis occurred in 12 of the 38 PCa patients. 68Ga-PSMA-11 PET/MR detected 39 cases of PCa with one of which was false-positive. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of 68Ga-PSMA-11 PET/MR were 100%(38/38), 6/7, 97.4%(38/39), 6/6 and 97.8%(44/45), respectively. The tumor tissues of PCa often showed focal radioactive uptake, and the T 2 weighted imaging (WI) showed focal low signal and limited dispersion. BPH showed slightly uneven uptake, and T 2WI and diffusion weighted imaging (DWI) showed uneven diffuse signals. SUV max of PCa was significantly higher than that of BPH (24.66±19.21 vs 4.97±2.13; t=5.208, P<0.001). ADC values of PCa were significantly lower than that of BPH ((0.91±0.37)×10 -3vs (1.08±0.24)×10 -3 mm/s 2; t=2.816, P<0.05). SUV max and the expression loads of PSMA in PCa were positively correlated with PSA ( r values: 0.42 and 0.71, both P<0.05). ADC values of tumor tissues in PCa were negatively correlated with PSA ( r=-0.37, P=0.013). Conclusion:68Ga-PSMA-11 PET/MR has great merits in the early diagnosis and staging of PCa.

Objective: To sum up the repair techniques of secondary alar deformity after the first phase reconstruction of alar defect. Methods: From January 2010 to December 2017, 17 patients with secondary alar deformity were included. Secondary alar deformities after the first stage reconstruction of alar defect included the abnormalities of alar groove line, absence of alar-cheek groove and the notch of alar rim. Z-plasty, V-Y advanced flaps, local skin flap and other technologies were introduced to repair details. Results: Infection was found in one case of the reconstruction of the alar-cheek groove and the wound was healed by treatment. There was no necrosis occurred in other flap. The shape of the alar was satisfactory and the anterior nostril was not narrow. Patients were followed up for 1 month to 1 year. The average follow-up time was 5 months. No recurrence of nasal alar tumor was found. The patients were satisfied with the appearance. Conclusions The symmetrical and satisfactory nasal shape can be obtained with local flaps such as Z-plasty, V-Y advancement of flaps for secondary alar deformities.

Objective:The mechanical properties of costal cartilage of different genders and layers were tested, and the differences in mechanical properties of costal cartilage of different genders and layers were discussed. The theoretical basis was provided for the clinical use of costal cartilage of different layers in different situations, and the long-term effect after cartilage implantation could be predicted.Methods:According to the inclusion criteria, from June 2018 to December 2019, patients who receive dauricle reconstruction with costal cartilage or supporting treatment with costal cartilage were collected from the Inpatient and Outpatient Department of Plastic Surgery of Sichuan Provincial People’s Hospital. The remaining central and marginal layers of the seventh costal cartilage were made into different sizes of cartilage blocks. The tensile strength test and compression test (including creep test and stress relaxation test) were carried out respectively. The counting data were described by the number of cases, and Fisher exact test was used to analyze the differences between groups; the measurement data were expressed by mean ± standard deviation, and the comparison between groups was analyzed witht-test.Results:A total of 28 patients, including 16 males, aged 12-24 years old and 12 females, aged 12-18 years old, were collected. In the tensile strength test, the tensile fracture rate of the central layer of costal cartilage in male was 87.5% (14 / 16) and that of marginal layer was 0, the difference was statistically significant ( P< 0.001). The tensile fracture rate of central layer of costal cartilage in female was 83.3% (10 / 12), and that of marginal layer was 0, the difference was statistically significant ( P< 0.001). In the creep test, there was no significant difference between the central layer and the marginal layer between 0.5 min and 2 min in men ( t=-1.439, P= 0.171), and there was no significant difference between the central layer and the marginal layer in women ( t=-0.731, P=0.480). In the stress relaxation test, there was no significant difference between the central layer of costal cartilage and the marginal layer in male ( t=-2.053, P=0.058); in female, the stress relaxation in the central layer of costal cartilage was (0.006 ± 0.003)%, and that in the marginal layer was (0.011 ± 0.004)%, which was significantly higher than that in the central layer ( t=-3.342, P=0.007). Conclusions:The central layer of the costal cartilage in young people is worse than the marginal layer in tensile strength, and the calcification obviously weakens the tensile strength of the costal cartilage. Clinically, considering the calcification of the cartilage, the appropriate layer should be selected according to different parts and uses.

Objective:The mechanical properties of costal cartilage of different genders and layers were tested, and the differences in mechanical properties of costal cartilage of different genders and layers were discussed. The theoretical basis was provided for the clinical use of costal cartilage of different layers in different situations, and the long-term effect after cartilage implantation could be predicted.Methods:According to the inclusion criteria, from June 2018 to December 2019, patients who receive dauricle reconstruction with costal cartilage or supporting treatment with costal cartilage were collected from the Inpatient and Outpatient Department of Plastic Surgery of Sichuan Provincial People’s Hospital. The remaining central and marginal layers of the seventh costal cartilage were made into different sizes of cartilage blocks. The tensile strength test and compression test (including creep test and stress relaxation test) were carried out respectively. The counting data were described by the number of cases, and Fisher exact test was used to analyze the differences between groups; the measurement data were expressed by mean ± standard deviation, and the comparison between groups was analyzed witht-test.Results:A total of 28 patients, including 16 males, aged 12-24 years old and 12 females, aged 12-18 years old, were collected. In the tensile strength test, the tensile fracture rate of the central layer of costal cartilage in male was 87.5% (14 / 16) and that of marginal layer was 0, the difference was statistically significant ( P< 0.001). The tensile fracture rate of central layer of costal cartilage in female was 83.3% (10 / 12), and that of marginal layer was 0, the difference was statistically significant ( P< 0.001). In the creep test, there was no significant difference between the central layer and the marginal layer between 0.5 min and 2 min in men ( t=-1.439, P= 0.171), and there was no significant difference between the central layer and the marginal layer in women ( t=-0.731, P=0.480). In the stress relaxation test, there was no significant difference between the central layer of costal cartilage and the marginal layer in male ( t=-2.053, P=0.058); in female, the stress relaxation in the central layer of costal cartilage was (0.006 ± 0.003)%, and that in the marginal layer was (0.011 ± 0.004)%, which was significantly higher than that in the central layer ( t=-3.342, P=0.007). Conclusions:The central layer of the costal cartilage in young people is worse than the marginal layer in tensile strength, and the calcification obviously weakens the tensile strength of the costal cartilage. Clinically, considering the calcification of the cartilage, the appropriate layer should be selected according to different parts and uses.

【Objective】 To investigate the frequencies of HLA-B alleles in Jiangsu Han population from Chinese Marrow Donor Program (CMDP) Jiangsu Branch in 8 prefecture-level cities, compare and analyze the distribution of common susceptible alleles at HLA-B locus in 8 prefecture-level cities. 【Methods】 The HLA-B locus of 27 249 unrelated volunteers from CMDP Jiangsu Branch were genotyped by polymerase chain reaction–sequence based typing (PCR-SBT) method, and frequencies of HLA-B alleles of 8 prefecture-level cities were calculated and compared. 【Results】 A total of 145 HLA-B alleles were detected in Jiangsu Han population, among them 104, 113, 83, 88, 88, 85, 84, 72 HLA-B alleles were detected in Changzhou, Nanjing, Zhenjiang, Yangzhou, Huai’an, Suqian, Xuzhou, and Yancheng Han population, respectively. In general, the common alleles in Changzhou, Yangzhou and Zhenjiang were very similar, and the most common alleles were B^*46∶01, 13∶02, 40∶01 and 58∶01. The common alleles in Nanjing, Huai’an and Suqian were rather similar, and the most common alleles were B^*13∶02, 46∶01, 40∶01, 58∶01 and 51∶01. The common alleles in Yancheng were rather similar to Nanjing, Huai’an and Suqian, with only difference in the order of B^*40∶01 and B^*58∶01. The common alleles in Xuzhou were close to Nanjing, Huai’an and Suqian too, with only difference in the order of B^*40∶01 and B^*46∶01. 【Conclusion】 The results reflected the distribution of HLA-B alleles of Jiangsu Han population from 8 prefecture-level cities and the gene distribution was basically consistent with the regional distribution. The major difference in HLA-B locus in Jiangsu 8 prefecture-level cities was B ^* 13∶02 and B ^* 46∶01. The frequency of B ^* 13∶02 in Northern Jiangsu (Huai’an, Suqian, Xuzhou, Yancheng) is much higher than that of B ^* 46∶01, and that in Nanjing is slightly higher than the frequency of B ^* 46∶01, which is consistent with that in North China. The frequency of B ^* 46∶01 in Southern Jiangsu (Changzhou), Yangzhou and Zhenjiang is higher than that of B ^* 13∶02, which is consistent with that in South China. The polymorphism analysis of alleles at HLA-B locus in 8 cities in Jiangsu Province provided significant basic data for the study of the correlation between HLA-B locus genes and diseases, as well as the population genetics and anthropology in Jiangsu Han population.