Objective:To investigate the clinicopathological characteristics and prognostic factors of different histological subtypes of intrahepatic cholangiocarcinoma (ICC).Methods:The retrospective cohort study was conducted. The clincopathological data of 171 patients with ICC who underwent initial curative resection in Peking University People′s Hospital from January 2015 to December 2023 were collected. There were 94 males and 77 females, aged 60(range, 53-68)years. Measurement data with normal distribution were expressed as Mean± SD, and comparison between groups was conducted using the independent sample t test. Measurement data with skewed distribution were expressed as M(range), and comparison between groups was conducted using the Mann-Whitney U test. Count data were described as absolute numbers, and comparison between groups was conducted using the chi‐square test or Fisher exact probability. The Kaplan‐Meier method was used to draw survival curve and calculate survival rates, and the Log-rank test was used for survival analysis. The COX stepwise regression model was used for univariate and multivariate analyses. Results:(1) Comparison of clinicopathological characteristics of different histological subtypes of ICC. Results of postoperative histopathological examination showed that of the 171 ICC patients, there were 76 cases of large duct type ICC and 95 cases of small duct type ICC. There was a significant difference in cases with concomitant intrahepatic biliary stone between patients with different histological subtypes of ICC ( P<0.05), and there were significant differences in cases with concomitant viral hepatitis, cases with CA19-9 >39 U/mL versus CA19-9 ≤39 U/mL, cases with CA19-9 >1 000 U/mL versus CA19-9 >39-1 000 U/mL, tumor gross morphology, and tumor peri-neural invasion between patients with different histological subtypes of ICC ( χ2=8.906, 18.208, 5.689, 43.886, 6.178, P<0.05). (2) Prognostic analysis of different histological subtypes of ICC. Of the 171 patients, 130 cases were followed up for 22(range, 16-43)months, including 63 cases of large duct type ICC and 67 cases of small duct type ICC. The 5-year overall survival rates of the 63 cases of large duct type ICC and 67 cases of small duct type ICC were 12.60% and 43.70%, respectively, showing a significant difference between them ( χ2=5.799, P<0.05). (3) Analysis of prognostic factors for patients undergoing radical resection of ICC. Results of multivariate analysis showed that tumor perineural invasion and lymph node metastasis were independent risk factors affecting overall survival rates of patients undergoing radical resection of ICC ( hazard ratio=0.447, 0.383, 95% confidence interval as 0.259-0.771, 0.225-0.651, P<0.05). Conclusions:There are differences in both clinicopatholo-gical characteristics and prognosis between patients with large duct type ICC and small duct type ICC. Tumor perineural invasion and lymph node metastasis are independent risk factors affecting overall survival rates of patients undergoing radical resection of ICC.

Objective:To investigate the clinicopathological characteristics and prognostic factors of different histological subtypes of intrahepatic cholangiocarcinoma (ICC).Methods:The retrospective cohort study was conducted. The clincopathological data of 171 patients with ICC who underwent initial curative resection in Peking University People′s Hospital from January 2015 to December 2023 were collected. There were 94 males and 77 females, aged 60(range, 53-68)years. Measurement data with normal distribution were expressed as Mean± SD, and comparison between groups was conducted using the independent sample t test. Measurement data with skewed distribution were expressed as M(range), and comparison between groups was conducted using the Mann-Whitney U test. Count data were described as absolute numbers, and comparison between groups was conducted using the chi‐square test or Fisher exact probability. The Kaplan‐Meier method was used to draw survival curve and calculate survival rates, and the Log-rank test was used for survival analysis. The COX stepwise regression model was used for univariate and multivariate analyses. Results:(1) Comparison of clinicopathological characteristics of different histological subtypes of ICC. Results of postoperative histopathological examination showed that of the 171 ICC patients, there were 76 cases of large duct type ICC and 95 cases of small duct type ICC. There was a significant difference in cases with concomitant intrahepatic biliary stone between patients with different histological subtypes of ICC ( P<0.05), and there were significant differences in cases with concomitant viral hepatitis, cases with CA19-9 >39 U/mL versus CA19-9 ≤39 U/mL, cases with CA19-9 >1 000 U/mL versus CA19-9 >39-1 000 U/mL, tumor gross morphology, and tumor peri-neural invasion between patients with different histological subtypes of ICC ( χ2=8.906, 18.208, 5.689, 43.886, 6.178, P<0.05). (2) Prognostic analysis of different histological subtypes of ICC. Of the 171 patients, 130 cases were followed up for 22(range, 16-43)months, including 63 cases of large duct type ICC and 67 cases of small duct type ICC. The 5-year overall survival rates of the 63 cases of large duct type ICC and 67 cases of small duct type ICC were 12.60% and 43.70%, respectively, showing a significant difference between them ( χ2=5.799, P<0.05). (3) Analysis of prognostic factors for patients undergoing radical resection of ICC. Results of multivariate analysis showed that tumor perineural invasion and lymph node metastasis were independent risk factors affecting overall survival rates of patients undergoing radical resection of ICC ( hazard ratio=0.447, 0.383, 95% confidence interval as 0.259-0.771, 0.225-0.651, P<0.05). Conclusions:There are differences in both clinicopatholo-gical characteristics and prognosis between patients with large duct type ICC and small duct type ICC. Tumor perineural invasion and lymph node metastasis are independent risk factors affecting overall survival rates of patients undergoing radical resection of ICC.

Objective:To study the expression and clinical significance of alpha-1 antitrypsin (A1AT) in the serum of patients with antiphospholipid syndrome (APS).Methods:The study recruited 131 patients with APS, 48 patients with other autoimmune diseases (8 patients with rheumatoid arthritis, 8 with osteoarthritis, and 32 with systemic erythematous sores), and 49 healthy people were recruited. The patients were admitted to Peking University People's Hospital during January 2019 to June 2022. A1AT expression in the serum of patients with APS and its clinical significance were investigated. Blood samples were collected and the concentration of A1AT in the samples was determined by enzyme-linked immunosorbent assay (ELISA). The correlation between A1AT and clinical and laboratory parameters of APS patients was analyzed. Statistical analysis and graphing were performed using GraphPadPrism 10.1.2. The categorical variables were subjected to the χ2 test, and the continuous variables were subjected to the normal distribution test. If the sample were normally distributed, the independent sample t-test (with homogeneity of variance) or the Welch's t-test (with heterogeneity of variance) was used for comparison between the 2 groups, and one-way analysis of variance (ANOVA) was used for comparison among multiple groups; Otherwise, and the variables were described as M( Q1, Q3), the Mann Whitney U-test was used for comparison between 2 groups, and the Kruskal-Wallis U-test was used for comparison among multiple groups. The Kruskal-Wallis H test was used for multiple comparisons. If the samples were normally distributed, Spearman correlation analysis was used to determine the correlation, otherwise, Pearson correlation analysis was used. Results:The serum A1AT concentrations were significantly higher in APS patients than in patients with other autoimmune diseases [2 048.0(670.6, 2 904.0) μg/ml vs. 1 099.0(0, 1 855.0) μg/ml, U=1 990, P<0.001] and healthy people [2 048.0(670.6, 2 904.0) μg/ml vs. 739.5 (0, 1 232.0) μg/ml, U=1 485, P<0.001]. No statistically significant difference was observed between patients with other autoimmune diseases and healthy people [1 099.0(0, 1 855.0) μg/ml vs. 739.5 (0, 1 232.0) μg/ml, U=924, P=0.060]. Mean serum A1AT concentrations were also higher in patients with both a history of adverse pregnancy and thrombosis than in those with morbid pregnancy only [(3 212 ±1 744)μg/ml vs. (1 965 ±1 500) μg/ml, t=2.27, P=0.026] and thrombosis only [(3 212 ±1 744)μg/ml vs. (1 963 ±1745)μg/ml, t=2.01, P=0.048]. Mean serum A1AT concentrations were higher in patients with both arterial and venous thrombosis than in those with only venous thrombosis [(3 390 ±2 286) μg/ml vs. (2 148 ±1 648) μg/ml, t=3.04, P=0.004]. The mean A1AT concentration was higher in patients with recurrent thrombosis than in patients with single thrombosis [(2 709 ±1 941) μg/ml vs. (1 805 ±1 627) μg/ml, t=2.10, P=0.040]. Using the 95% upper limit of A1AT concentration in healthy controls (1 066 μg/ml) as a cut-off value, the risk of recurrent thrombosis was higher in A1AT-positive than negative TAPS patients [51.0%(25/49) vs. 26.1%(6/23), χ2=3.97, P=0.046]. In terms of laboratory indicators, there was a significant positive correlation between serum A1AT concentration and ESR level ( r=0.28, P=0.045), a significant negative correlation with C4 level ( r=-0.24, P=0.025). There was a significant positive correlation with fibrinogen (FIB) concentration( r=0.25, P=0.027). A1AT was an effective diagnostic marker of APS [AUC(95% CI)=0.769(0.699, 0.847), P<0.001], with a sensitivity of 71.8%, a specificity of 73.7%, and Youden index of 0.452. Conclusion:A1AT was is significantly elevated in the serum of patients with APS and may be associated with the severity of thrombotic event.

Pulmonary blast injury has become the main type of trauma in modern warfare, characterized by externally mild injuries but internally severe injuries, rapid disease progression, and a high rate of early death. The injury is complicated in clinical practice, often with multiple and compound injuries. Currently, there is a lack of effective protective materials, accurate injury detection instrument and portable monitoring and transportation equipment, standardized clinical treatment guidelines in various medical centers, and evidence-based guidelines at home and abroad, resulting in a high mortality in clinlcal practice. Therefore, the Trauma Branch of Chinese Medical Association and the Editorial Committee of Chinese Journal of Trauma organized military and civilian experts in related fields such as thoracic surgery and traumatic surgery to jointly develop the Clinical treatment guideline for pulmonary blast injury ( version 2023) by combining evidence for effectiveness and clinical first-line treatment experience. This guideline provided 16 recommended opinions surrounding definition, characteristics, pre-hospital diagnosis and treatment, and in-hospital treatment of pulmonary blast injury, hoping to provide a basis for the clinical treatment in hospitals at different levels.

Objective:To explore the application value of different methods of segmented latissimus dorsi myocutaneous flap in repairing chest wall defects after local advanced breast cancer surgery.Methods:The clinical data of 64 patients with unilateral locally advanced breast cancer admitted to Shanxi Cancer Hospital from Feb. 2019 to Jan. 2020 were selected. All patients underwent modified radical mastectomy for breast cancer. The patients were divided into two groups according to the random number table method. Antegrade (group A, n=32 cases) and retrograde (group B, n=32 cases) were used to design and cut the segmented latissimus dorsi myocutaneous flap to repair the defects. The range of skin island cut was 14 cm×6 cm-19 cm×7 cm; The donor area of the flap was closed directly. The application effects of the two groups of methods were compared. Results:In group A, one antegrade flap was partially necrotic, while in group B, six retrograde flaps were partially necrotic ( P>0.05). The delayed healing rate of donor site incision in group A was 6.25%, significantly lower than that in group B (25.00%) ( χ2=4.267, P=0.039). All the patients in both groups were followed up for 12 to 24 months, and the appearance and texture of the flaps were satisfactory; Only linear scar was left in the donor area, and the shoulder joint activity was not affected. The mean survival time was 20.8 months. Conclusion:The antegrade latissimus dorsi myocutaneous flap can repair the large area defect of chest wall after LABC, which can ensure the blood supply of the flap to the greatest extent, reduce the closing tension of the donor area, the incidence of postoperative complications, and promote the healing of the incision.