Objective To analyze CT findings of nasal NK/T-cell lymphoma.Methods The CT findings of 11 nasal NK/T-cell lymphomas, 134 nasal polyps and 24 nasal inverted papillomas were analyzed retrospectively.Fisher exact test was used to compare the differences of the three nasal lesions.Results Compared with the nasal polyps, nasal NK/T-cell lymphoma had a higher occurrence in the unilateral nasal cavity, more presented as nodular mass or mold growth,and more easily to invade nasal vestibule,nasal ala,nasal mucosal,nasopharyngeal wall and causebone destruction.Compared with the inverted papilloma,nasal NK/T-cell lymphoma had a higher incidence of tumor invasion to nasal vestibule, nasal ala, nasopharyngeal cavity, nasal mucosal.Conclusion Nasal NK/T-cell lymphoma is a homogenous tumor and often occurres in the unilateral nasal cavity, which creeps along the lateral wall of the nasal cavity, and causes the damage of nasal mucosal and surrounding soft tissue and slight destruction of bone in the early satge.

Objective To visualize the pelvic floor structures by translabial three‐dimensional(3D) ultrasonography performed during labor and immediately after delivery, and to observe the morphological changes of levator hiatus in intrapartum women. Methods Totally 62 nulliparous women with singleton pregnancy and cephalic presentation in labor ward underwent intrapartum translabial 3D ultrasound examination before cervical dilatation, at 10 cm dilatation and immediately after delivery. Volume datasets were obtained at rest, biometric measurements and observation of the morphological changes of levator hiatus in different stages were determined in the axial plane. Comparative analyses of parameters in three stages were carried out. Results Translabial 3D ultrasound demonstrated the pelvic floor structures of intrapartum women well. All biometric measurements of the hiatus before cervical dilatation were the smallest and became the largest at 10 cm dilatation, showed statistically significant differences. The measurements after delivery got smaller immediately but still significantly larger than those before cervical dilatation ( P <0 0.01). Conclusions Translabial 3D ultrasound examination of the pelvic floor during labor and within the first 2h after delivery is feasible. It seems to be an effective tool to visualize pelvic floor structures in intrapartum women. Hiatal enlargement may be a common consequence of vaginal childbirth.

Objective To explore the value of Color Doppler Flow Imaging in diagnosis of superfi-cial substantial tumors.Methods Retrospective analysis of 742 cases of superficial substantial masses ( all confirmed by operation and pathology) of Patients'ultrasonography , and summarized its features of benign and malignant, and made a comparison.Results Of the 742 patients, ultrasound detection rate of 100%, including 12 cases of malignant lesions, ultrasound diagnosis of 12 malignant cases, the accuracy rate of 100%;730 cases of benign lesions, ultrasound diagnosis of 711 cases of benign, qualitative accuracy rate 97.4%.Conclusions Color Doppler Flow Imaging has an important value in the diagnosis of benign and malignant of superficial substantial tumors.

Objective To evaluate the accuracy of MSCT in the pre-operative N-staging and diagnosis of metastatic lymph nodes in each group of gastric cancer.Methods Pathological and CT data of 91 patients with gastric cancer proved by surgery and pathology were analyzed retrospectively.Three-phase dynamic enhancements were performed before surgery in a unified way of hypotonic oral water,N-stage and grouping of lymph nodes of the preoperative CT imaging were evaluated by using the established diagnostic criteria and then compared with the results of surgery and pathology,the accuracy of staging and grouping was analyzed by using Kappa test.Results The accuracy of MSCT diagnosing the N-staging as a whole was 86.3%.The accuracy for N0,N1,N2 and N3 was 83.5%,89.0%,83.5% and 89.0%,respectively.The sensitivity was 86.5%,83.3%,50% and 47.4%,respectively.The specificity was 79.5%,89.4%,89.6% and 100.0%, respectively.The sensitivity for N0 was statistically different from that for N2, N0 and N3(P≤0.007).The detected accuracy for the group of left side of the cardium (No.2), periphery of the splenic hilum (No.10), posterior of the pancreastic head (No.13) were higher than other groups on MSCT with the accuracyof 100%.The sensitivity for the group of No.2,periphery of the coeliac trunk(No.9),No.10,and No.13 was 100%.The specificity for the group of No.2,No.10,and No.13 was 98.9%.Conclusion Relatively high accuracy in the preoperative N-staging and diagnosis of metastatic lymph nodes in each group of gastric cancer can be obtained by MSCT, which provide reliable information for preoperative assessment and intraoperative lymph node dissections.

Objective To investigate the dynamic change and the clinical curative effect evaluation of plasma (1-3)-beta glucan D (BG) in the patients with pulmonary disease complicating fungal infection .Methods The MB-80 miroorganism dynamic rapid de-tection system and fungi BG detection kits were adopted to detect plasma BG content before and after treatment in 87 cases of pul-monary disease complicating fungal infection and the controls .The sputum culture in the patients was performed before and after treatment .Results Plasma BG levels before antifungal therapy ,at 1 ,2 weeks after treatment in 87 patients were (162 .81 ± 70 .03) , (15 .89 ± 30 .88) and (4 .58 ± 7 .87)pg/mL ,which in the control group was (5 .62 ± 1 .83)pg/mL ,plasma BG level had statistical differences between before treatment and at 1 ,2 weeks after treatment in the patients with the control group (P<0 .05);Plasma BG levels between at 1 week after treatment with at 2 weeks after treatment and the control group had statistically significant differ-ences (P<0 .05) .Among 87 patients ,66 cases were positive sputum culture at 1 week after antifungal drug treatment and 9 cases were positive sputum culture at 2 weeks after treatment .Conclusion Continuously monitoring the patient′s plasma BG level com-bined with the sputum fungal culture results ,clinical symptoms and lung shadow in X-ray has certain clinical value to judge the anti-fungal effect .

Abstract Developmental dyslexia (DD) is a common learning disability that can cause long-term psychological and physical damage to children. However, up to now, the underlying mechanism of DD is still unclear, and there is no gold standard diagnosis and treatment measures. Compared with western countries, research on Chinese DD is lagging behind, which greatly affects the prognosis of Chinese DD children. Extensive research on DD is needed for developing a diagnostic system suitable for children with developmental disorders in China.

Objective:To investigate the effects of rapamycin (RAPA) on the cognitive function of lupus mice by regulating Cysteine rich 61 (Cyr61) and autophagy.Methods:MRL/lpr lupus mice were randomly divided into lupus group and rapamycin + lupus group, wild-type C57BL/6 mice were randomly divided into normal control group and rapamycin group with six mice in each group, RAPA + lupus group and rapamycin group were intraperitoneally injected with RAPA (2.0 mg/kg). The lupus group and the normal control group were injected with equal amounts of dimethyl sulfoxide (DMSO). Morris water maze was used to observe the cognitive function of mice. Western blotting was used to detect the expression of Cyr61, Programmed cell death-1 (Beclin-1), Microtubule associated protein 1 light chain3B (LC3B). Hematoxylin-eosin (HE) staining was used to observe the pathological changes in the hippocampus. The changes of neurons and bodies in hippocampus were observed by Nissl staining. The localization and expression of Cyr61 and LC3B in hippocampus were detected by immunofluorescence staining. One-way analysis of variance (ANOVA) was used between groups, and LSD-T test was used for pairwise comparison.Results:Western blotting results showed thatthe protein expression of Cyr61 (0.99±0.15) was significantly increased ( P=0.011), and the protein expression of Beclin-1 (0.64±0.04) and LC3B(0.54±0.05) was significantly decreased in lupus group ( P=0.025, P= 0.008) when compared with normal control group (0.73±0.08, 0.81±0.12, 0.80±0.03). The expressions of Cyr61 (0.75±0.05, 0.75±0.08), Beclin-1 (0.84±0.08, 0.92±0.04) and LC3B (0.93±0.16, 0.76±0.08) in rapamycin group and rapamycin + lupus group were not significantly changed ( P>0.05). Compared with rapamycin group, the protein expression of Cyr61 (0.99±0.15) was significantly increased ( P=0.016), and Beclin-1 (0.64±0.04), LC3B (0.54±0.05) was significantly decreased in lupus group ( P=0.013, P=0.001). The expressions of Cyr61 (0.75± 0.08), Beclin-1 (0.92±0.04) and LC3B (0.76±0.08) were not significantly changed in rapamycin+lupus group ( P=0.999, P=0.241, P=0.062). Compared with lupus group, the expression of Cyr61 (0.75±0.08) protein in rapamycin+lupus group was significantly decreased ( P=0.016), and the expression of Beclin-1 (0.92±0.04) and LC3B(0.76±0.08) protein were significantly increased ( P=0.002, P=0.017). Immunofluorescence results showed that Cyr61 and LC3B were mainly expressed in the cytoplasm of hippocampal neurons, and the quantitative detection results were consistent with western blot results, the differences were statistically significant ( P=0.025, P=0.032). HE staining showed that the levels and number of cells in the hippocampus of mice with lupus were reduced, and the arrangement was sparse, and the nuclei were hyperchromatic, showing nuclear pyknosis and migration. The results of Nissl staining showed that there were relatively fewer Nissl bodies, loose arrangement of neurons and vacuolar areas in some cells, which were improved after RAPA treatment in lupus mice. Conclusion:RAPA can protect the cognitive function of lupus mice by inhibiting the expression of Cyr61 in hippocampus and promoting autophagy.

Objective To observe the value of MRI in evaluation on the morphology and function of iliococcygeal muscles in fertile and nulliparous women.Methods Totally 50 healthy fertile women (fertile group,further divided into cesarean section subgroup and spontaneous delivery subgroup according to the mode of delivery) and 17 nulliparous healthy women (nulliparous group) underwent MR scanning in both natural and increased abdominal pressure state.Iliococcygeus thickness (ICT),coronal iliococcygeal angle (cICA) and sagittal iliococcygeal angle (sICA) of different states were measured and compared between the groups.Results In the natural state,the right and bilateral average sICA in the fertile group were larger than those in nulliparous group (both P＜0.05),while no statistical difference of ICT,right,left and bilateral average cICA and left sICA were found between two groups (all P＞0.05);the bilateral average sICA in spontaneous delivery subgroup was larger than that in cesarean section subgroup (P＜0.05).In increased abdominal pressure state,left,right sICA and bilateral average sICA in fertile group were larger than those in nulliparous group (all P＜0.05),while there was no statistical difference of ICT and cICA between two groups (all P＞0.05);no statistical difference of ICT,cICA nor sICA was found between spontaneous delivery subgroup and cesarean section subgroup (all P＞0.05).Conclusion MRI can accurately evaluate morphological and functional changes of iliococcygeal muscle in females.

Objective:To investigate the value of CT radiomic model based on analysis of primary gastric cancer and the adipose tissue outside the gastric wall beside cancer in differentiating stage T1-2 from stage T3-4 gastric cancer.Methods:This study was a case-control study. Totally 465 patients with gastric cancer treated in Affiliated People′s Hospital of Jiangsu University from December 2011 to December 2019 were retrospectively collected. According to postoperative pathology, they were divided into 2 groups, one with 150 cases of T1-2 tumors and another with 315 cases of T3-4 tumors. The cases were divided into a training set (326 cases) and a test set (139 cases) by stratified sampling method at 7∶3. There were 104 cases of T1-2 stage and 222 cases of T3-4 stage in the training set, 46 cases of T1-2 stage and 93 cases of T3-4 stage in the test set. The axial CT images in the venous phase during one week before surgery were selected to delineate the region of interest (ROI) at the primary lesion and the extramural gastric adipose tissue adjacent to the cancer areas. The radiomic features of the ROIs were extracted by Pyradiomics software. The least absolute shrinkage and selection operator was used to screen features related to T stage to establish the radiomic models of primary gastric cancer and the adipose tissue outside the gastric wall beside cancer. Independent sample t test or χ2 test were used to compare the differences in clinical features between T1-2 and T3-4 patients in the training set, and the features with statistical significance were combined to establish a clinical model. Two radiomic signatures and clinical features were combined to construct a clinical-radiomics model and generate a nomogram. The area under the receiver operating characteristic curve (AUC) was used to evaluate the efficacy of each model in differentiating stage T1-2 from stage T3-4 gastric cancer. The calibration curve was used to evaluate the consistency between the T stage predicted by the nomogram and the actual T stage of gastric cancer. And the decision curve analysis was used to evaluate the clinical net benefit of treatment guided by the nomogram and by the clinical model. Results:There were significant differences in CT-T stage and CT-N stage between T1-2 and T3-4 patients in the training set ( χ2=10.59, 15.92, P=0.014, 0.001) and the clinical model was established. After screening and dimensionality reduction, the 5 features from primary gastric cancer and the 6 features from the adipose tissue outside the gastric wall beside cancer established the radiomic models respectively. In the training set and the test set, the AUC values of the primary gastric cancer radiomic model were 0.864 (95% CI 0.820-0.908) and 0.836 (95% CI 0.762-0.910), and the adipose tissue outside the gastric wall beside cancer radiomic model were 0.782 (95% CI 0.731-0.833) and 0.784 (95% CI 0.702-0.866). The AUC values of the clinical model were 0.761 (95% CI 0.705-0.817) and 0.758 (95% CI 0.671-0.845), and the nomogram were 0.876 (95% CI 0.835-0.917) and 0.851 (95% CI 0.781-0.921). The calibration curve reflected that there was a high consistency between the T stage predicted by the nomogram and the actual T stage in the training set ( χ2=1.70, P=0.989). And the decision curve showed that at the risk threshold 0.01-0.74, a higher clinical net benefit could be obtained by using a nomogram to guide treatment. Conclusions:The CT radiomics features of primary gastric cancer lesions and the adipose tissue outside the gastric wall beside cancer can effectively distinguish T1-2 from T3-4 gastric cancer, and the combination of CT radiomic features and clinical features can further improve the prediction accuracy.