Objective To explore the value of deep learning models in predicting axillary lymph node(ALN)metastasis of breast cancer based on intratumoral and peritumoral dynamic contrast-enhanced magnetic resonance imaging(DCE-MRI).Methods A retrospective analysis was conducted on cases from Tianjin Medical University Cancer Hospital and Laoshan Branch of Affiliated Hospital of Qingdao University,involving a total of 850 lesions in 850 patients.The region of interest within the tumor was delineated at the largest area of the lesion on the first enhancement images and automatically expanded by 3 mm and 6 mm in a conformal fashion.Deep learning prediction models based on ResNet50 were developed via intratumoral,peritumoral,and intratumoral combined peritumoral models,respectively,and a comprehensive prediction model was developed by integrating semantic features of imaging reports.Cases from Tianjin Medical University Cancer Hospital were randomly divided into training and test cohorts in a 7∶3 ratio,while cases from Laoshan Branch of Affiliated Hospital of Qingdao University served as the external validation cohort.The area under the curve(AUC),accuracy,sensitivity,specificity,F1-score,and Brier-score were calculated,respectively.Results The model incorporating intratumoral,peritumoral(3 mm),and semantic features demonstrated the highest performance,with AUC of 0.801[95％confidence interval(CI)0.765-0.845],0.781(95％CI 0.745-0.817),and 0.752(95％CI 0.700-0.793)in the training cohort,test cohort,and external validation cohort,respectively,and there was no significant difference in AUC between combined model and intratumoral/peritumoral model,respectively,but it demonstrated the higher sensitivity and F1-score,and the lower Brier-score.Conclusion Incorporating peritumoral images into the conventional model based on intratumoral images enhanced the predictive ability of ALN metastasis in breast cancer.

Objective:To establish an animal model of acute systemic cold injury in mice.Methods:There were 98 C57BL/6 mice, half male and half female, with body weight of 22-27 g and age of 10 weeks. The mice were randomly divided into 7 groups ( n=14) according to the changes of anal temperature in cold environment, namely, group A (38.5 ± 1) ℃, group B (35 ± 1) ℃, group C (30 ± 1) ℃, group D (25 ± 1) ℃, group E (20 ± 1) ℃, group F (15 ± 1) ℃, and group G (10 ± 1) ℃, among which, group A was the blank control group, and the rest groups were the experimental group. The mice in the blank control group were placed in the normal environment (20 ± 5) ℃, and the mice in the experimental group were placed in the low temperature artificial climate box at - 20℃. The anal temperature of the mice was measured intermittently (as the core temperature), and the time required for the core temperature of the mice to drop to groups B, C, D, E, F and G was recorded. The righting reflex was used to evaluate the consciousness state, the action ability and the general state of each organ of mice were observed, and the blood routine and HE staining of each organ were detected. Results:The lower the core temperature of the experimental group, the longer the time required. The consciousness state, action ability, general state of organs, blood routine, and HE staining of organs in groups B, C, and D were basically the same as those in group A, and there was no acute systemic cold injury. Therefore, the blood routine, general observation of organs, and HE staining of organs in groups B, C, and D were no longer displayed compared with those in group A. Compared with group A, mice in group E began to suffer from disturbance of consciousness and action ability. With the decrease of core body temperature, the damage was aggravated, and mice in group G died. Compared with group A, the indices of blood routine test (WBC, RBC, HGB, PLT) of mice in group E began to decrease, and the univariate variance calculation showed that only WBC changes had statistical significance ( P<0.05). Compared with groups A and E, the indices of blood routine test (WBC, RBC, HGB, PLT) of mice in group F were further reduced, and the changes of each index in univariate variance calculation were statistically significant ( P<0.05). The general observation results showed that compared with group A, the lung, liver and spleen surfaces of mice in group E began to darken, and compared with groups A and E, the lung, liver, spleen, kidney and heart of mice in group F were further deepened and darkened, with irregular edges. HE staining results of various organs showed that compared with group A, the mice in group E began to have partial alveolar structure destruction and a small amount of inflammatory cell infiltration, the central vein of the liver was slightly congested, and the red and white pulp of the spleen were indistinct. Compared with groups A and E, the pathological structure damage of the lung, liver, spleen, kidney, heart and brain tissues of the mice in group F was further aggravated. Conclusions:Detection of consciousness state, action ability, general state of organs, blood routine and HE staining indices of organs in mice under low temperature can simulate the progress of clinical acute cold injury, and the animal model of acute systemic cold injury was successfully prepared.

Wound healing is a complex pathophysiological process that is affected by many systemic and local factors. Undisturbed wound healing (UWH) is a new concept whereby the disturbance to the wound healing process is reduced and the wound healing outcome is improved mainly through the selection of wound dressings with appropriate performance and reducing the frequency of dressing changes. This paper summarizes the development, intervention measures, and advantages of the concept of UWH, aiming to provide new ideas and directions for wound diagnosis and treatment.

Objective: To establish a prediction model for the distant metastasis of breast cancer based on qualitative magnetic reso-nance imaging (MRI) parameters. Methods: A retrospective analysis of 3,032 patients with breast MRI from January 2011 to Decem-ber 2016 in Tianjin Medical University Cancer Institute and Hospital was conducted. After the confirmation of invasive breast cancer, the subjects were divided in 2 groups: metastasis and metastasis-free. A total of 93 patients were included in the metastasis group, and 186 patients without the presence of distant metastasis in the metastasis-free group. We analyzed the correlation between breast cancer molecular subtypes and distant metastasis in the metastasis group. Univariate and Logistic regression analyses of qualitative MRI features were performed for the groups. Subsequently, we used the results to establish prediction models. Results: The results showed that hormone receptor-positive tumors (Luminal type) had a greater tendency to develop bone metastasis in the metastasis group. Triple-negative tumors showed a greater tendency to develop lung metastasis. Human epidermal growth factor receptor 2 gene overexpression cases were more likely to develop liver metastasis. The results of the univariate analysis showed that the type of le-sion, multifocality or multicentricity of the cancer, T1-weighted signal uniformity, T2-weighted signal uniformity, and tumor size were statistically different between the groups (P<0.05). The results of the logistic regression analysis showed that the type of lesion, multi-focality or multicentricity of the cancer, T2-weighted signal uniformity, and tumor size were independent predictors of distant metasta-sis. Based on select independent predictors, we established a prediction model for the distant visceral metastasis of breast cancer. The accuracy, area under the curve, sensitivity, and specificity of the model were 82.8%, 0.801, 85.7%, and 75.0%, respectively. Conclu-sions: The prediction model based on the clinical pathology and MRI features established in this study can predict the distant metasta-sis of breast cancer.

Objective To develop and validate a radiomics predictive model based on mammogram for preoperative predicting triple-negative breast cancer (TNBC) or non-triple-negative breast cancer (NTNBC). Methods We retrospectively analyzed 459 Chinese women who were diagnosed with invasive breast cancer (confirmed by pathology) during August 2015 to November 2015. Our cohort included 34 TNBC and random selected 102 NTNBC cases. Regions of interest (ROIs) were manually selected from craniocaudal and mediolateral oblique mammograms by radiologists through manual lesion segmentation, and 43 radiomics features were evaluated. Craniocaudal (CC) single-view, mediolateral oblique (MLO) single-view and CC and MLO double-view classification model were constructed respectively. Classification performance was evaluated by the area under receiver operating characteristic curve (AUC), accuracy, sensitivity and specificity. Kruskal-Walls U test and t test were used to compare the radiomics features between TNBC and UTNBC. Results The model that used the combination of both the CC and MLO view images achieved the overall best performance than using either of the two views alone, yielding an AUC of 0.791, accuracy of 0.798, sensitivity of 0.776 and specificity of 0.806 for TNBC comparing with NTNBC. Three features were selected by the model (gray scale span and inverse different moment for CC, roundness for MLO) showed a statistical significance (P<0.05) and AUC>0.6 in the subtype classification. Conclusion This research constructed model based on mammograms classification model can effectively distinguish between TNBC and NTNBC. This model has potential value for breast cancer molecular subtype classification and clinical treatment.

Objective To explore the influencing factors for carer burdens from hospitalized patients with hip fractures and the effects of cognitive behaviour intervention. Methods A total of 120 key carers of 120 hospitalized patients with hip fractures were selected, and CBI, SAS and SDS were applied to carried out baseline investigation for carers. Influ-encing factors for carer burdens were analyzed, and they were afterwards randomly assigned to an intervention group and a control group with 60 patients in each. The intervention group was given cognitive behaviour intervention. CBI, SAS and SDS were compared between the two groups. Results Educational level, relation with the patients, common caregivers, caring time, household family income and patients' self-care ability were correlated with carer burdens (P<0.05), in which common caregivers, caring time and patients' self-care ability were independent influencing factors for carer burdens (P<0.05). After intervention, development limitation burdens, social burdens, emotional burdens and total burdens were all significantly lower than those in the control group (P<0.05), and SAS and SDS scores were signifi-cantly lower than those in the control group (P<0.05). CBI score was positively correlated with SAS and SDS scores (r=0.398, 0.318, P<0.05). Conclusion During caring period for carers for hospitalized patients with hip fractures, intensity, time, patients independence degree and anxiety and depression degrees are closely correlated with their burdens, and cognitive behaviour intervention is able to effectively improve carers' burdens and psychological states.

Objective To investigate the relative percentage of normal cognitive function (NCF),age associated memory impairment (AAMI),mild cognitive impairment (MCI) and Alzheimer's disease (AD) in the elderly,and the correlation between cognitive function and ApoE genotypes.Methods A total of 2666 elderly people aged ≥65 years (2132 males and 534 females)were divided into 3 groups according age:65-74-year age group (925 cases),75-84 year age group (1054 cases) and 85-100-year age group (687 cases).ApoE genotypes were determined in the controls and patients with AAMI and MCI.The degrees of fundus arteriosclerosis were detected in all subjects except for patients with AD.Results There were 867 cases with NCF,860 cases with AAMI and 782 cases with MCI.The incidence of AAMI was higher in 65-74-year age group than in the other two groups (42.0％ vs.31.1,20.96).The incidences of MCI and AD were higher in 85-100-year age group than in the other groups (42.5％,13.3％).The major degrees of fundus arteriosclerosis were Ⅰ+,Ⅰ-Ⅱ°,Ⅱ in subjects with AAMI (34.7％,x2=10.02,P＜0.01) and were Ⅱ °/ Ⅱ + / Ⅲ° in subjects with MCI (34.9 ％,x2 =23.39,P＜0.001).The APOEε4 allele frequency was significantly higher in patients with MCI than in the controls (x2=8.31,P＜0.05).However,no significant differences in APOEε4 allele frequency were found between patients with AAMI and the controls.Conclusions The incidence of AAMI is highest in 65-74-year age group,while the incidences of MCI and AD are highest in 85-100-year age group.Compared to patients with AAMI,the more serious fundus arteriosclerosis and higher allele frequency of APOEε4 appear in patients with MCI.

Multiple myeloma is common in the older population and is treated mainly with chemotherapy. However, chemotherapy-related side effects imitate the clinical manifestations of Sheehan's syndrome, which leads to misdiagnosis and missed diagnosis, particularly for older patients without a clear history of postpartum hemorrhage. Therefore, when older women with malignant myelomas show refractory hyponatremia and gastrointestinal disorders while under chemotherapy, a diagnosis of Sheehan's syndrome should be considered. The early detection of the disorder will guarantee timely individualized treatment.

OBJECTIVETo investigate the histopathological changes in the liver and other organs after impact injury.

METHODSThe rabbits were impacted with a BIM-IV biological impacting machine at the xiphoid process. The severity of liver injury was graded and scored through gross anatomy. At the same time, the pathological changes in the liver, heart, and lung were observed by light and electron microscopes.

RESULTSLight microscopy showed that the pathological changes in the liver were: 1) loss of normal structure, hemorrhage and distortion of hepatic lobules; 2) cloudy swelling, degeneration, vacuolation and necrosis of liver cells; 3) infiltration of neutrophils. The lungs were injured and there were liver cell emboli in the small pulmonary arteries. Electron microscopy showed that the ultrastructure of the liver cells was severely damaged and the cells had significant features of necrosis.

CONCLUSIONSThe major pathomorphological changes in the liver after impact injury are hemorrhage and necrosis. They may be complicated by exfoliation of liver cells to hepatic sinusoids. These cells circulate with the blood to form emboli in the pulmonary blood vessels.

Animals ; Female ; Hemorrhage ; pathology ; Liver ; injuries ; pathology ; Male ; Myocardium ; pathology ; Necrosis ; Rabbits

0.05).The C myc and N ras protein expression of 2.2.15 were reduced after ASONs were used 3 days.There was a significant difference between ASON group and control group ( P