北京大学学报（医学版）最新文献

{"title":"[Optical coherence tomography angiography and microvessel density quantification in penumbra after traumatic brain injury in rats].","authors":"Peng Zhong, Xiaodan Hu, Zhenzhou Wang","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Objective: </strong>To observe the dynamic changes of microvascular injury and repair in the penumbra of traumatic brain injury (TBI) rats with effective cerebral perfusion microvascular imaging using optical coherence tomography angiography (OCTA).</p><p><strong>Methods: </strong>Transparent closed cranial windows were placed in craniotomy rats after TBI caused by weight drop. All the rats in TBI group and control group underwent head MRI examination on the first postoperative day, and the changes of cerebral cortical microvessel density were measured by OCTA through cranial windows on d0, d2, d4, d6, and d8. On the second day after the operation, the same number of rats in the two groups were selected to complete the immunohistochemical staining of brain tissue with pimonidazole, an indicator of hypoxia.</p><p><strong>Results: </strong>MRI T2W1 and immunohistochemical staining demonstrated that edema and hypoxia in the traumatic brain tissue extended deeply throughout the entire cortex. OCTA showed that the cortical surface veins of the rats in both groups were significantly dilated and tortuous after operation, and recovered to the postoperative day level on d8. The effective perfusion microvessel density of the rats in both groups gradually recovered after a temporary decrease, and the TBI group decreased from 39.38%±4.48% on d0 to 27.84%±6.01% on d2, which was significantly lower than that on d0, d6, and d8 (<i>P</i> < 0.05). The highest value was 61.71%±7.69% on d8, which was significantly higher than that on d0, d2, and d4 (<i>P</i> < 0.05). The control group decreased from 44.59%±7.78% on d0 to 36.69%±5.49% on d2, which was significantly lower than that on d0, d6, and d8 (<i>P</i> < 0.05). The highest value was 51.92%±5.96% on d8, which was significantly higher than that on d2, and d4 (<i>P</i> < 0.05). Comparing the two groups, the effective perfusion microvessel density in the TBI group was significantly lower than that in the control group on d2 (<i>P</i>=0.021), and significantly higher than that in the control group on d8 (<i>P</i>=0.030).</p><p><strong>Conclusion: </strong>OCTA can be used as a method of imaging and measurement of effective perfusion microvessels in the injured cerebral cortex of TBI rats. After TBI, the effective perfusion microvessel density in the wound penumbra gradually recovered after decreasing, and increased significantly on d8.</p>","PeriodicalId":8790,"journal":{"name":"北京大学学报（医学版）","volume":"57 2","pages":"262-266"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11992443/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143966544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Biocompatibility of 3D printed biodegradable WE43 magnesium alloy scaffolds and treatment of bone defects].","authors":"Shuyuan Min, Yun Tian","doi":"","DOIUrl":"","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Objective: &lt;/strong&gt;To investigate the biocompatibility of porous WE43 magnesium alloy scaffolds manufactured by 3D printing technology and to observe its effect in treating femoral defects in New Zealand white rabbits.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Methods: &lt;/strong&gt;&lt;i&gt;In vitro&lt;/i&gt; cytotoxicity test was performed using bone marrow mesenchymal stem cells from Sprague Dawley (S-D) rats. According to the different culture media, the cells were divided into 100% extract group, 50% extract group, 10% extract group and control group. After culturing for 1, 3 and 7 days, the cell activity of each group was determined by cell counting kit-8 (CCK-8). In the &lt;i&gt;in vivo&lt;/i&gt; experiment, 3.0-3.5 kg New Zealand white rabbits were randomly divided into three groups: Experimental group, bone cement group and blank group, with 9 rabbits in each group. Each rabbit underwent surgery on the left lateral femoral condyle, and a bone defect with a diameter of 5 mm and a depth of 6 mm was created using a bone drill. The experimental group was implanted with WE43 magnesium alloy scaffolds, the bone cement group was implanted with calcium sulfate bone cement, and the blank group was not implanted. Then 4, 8 and 12 weeks after surgery, 3 rabbits in each group were euthanized by carbon dioxide anesthesia, and the femur and important internal organs were sampled. Micro-computed tomography (Micro-CT) scanning was performed on the left lateral femoral condyle. Sections of important internal organs were prepared and stained with hematoxylin-eosin (HE). Hard tissue sections were made from the left lateral femoral condyle and stained with methylene blue acid fuchsin and observed under a microscope.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;In the cytotoxicity test, the cell survival rate in the 100% extract group was higher than that in the control group (140.56% &lt;i&gt;vs&lt;/i&gt;. 100.00%, &lt;i&gt;P&lt;/i&gt; &lt; 0.05) on 1 day of culture; there was no statistically significant difference (&lt;i&gt;P&lt;/i&gt;&gt;0.05) in cell survival rate among the groups on 3 days of culture; the cell survival rate in the 100% extract group was lower than that in the control group (68.64% &lt;i&gt;vs&lt;/i&gt;. 100.00%, &lt;i&gt;P&lt;/i&gt; &lt; 0.05) on 7 days of culture. Micro-CT scanning in the &lt;i&gt;in vivo&lt;/i&gt; experiment found that most of the scaffolds in the experimental group had been degraded in 4 weeks, with very few high-density scaffolds remaining. In 12 weeks, there was no obvious stent outline. In 4 weeks, a certain amount of gas was generated around the WE43 magnesium alloy scaffold, and the gas was significantly reduced from 8 to 12 weeks. Hard tissue sections showed that a certain amount of extracellular matrix and osteoid were generated around the scaffolds in the experimental group in 4 weeks. In the bone cement group, most of the calcium sulfate bone cement had been degraded. In 8 weeks, the osteoid around the scaffold and its degradation products in the experimental group increased significantly. In 12 weeks, new bone was in contact with the scaffold","PeriodicalId":8790,"journal":{"name":"北京大学学报（医学版）","volume":"57 2","pages":"309-316"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11992460/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143968195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[<i>In vitro</i> study of using single cone obturation technique in artificial canals with an isthmus].","authors":"Yuqi Ma, Yuhong Liang","doi":"","DOIUrl":"","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Objective: &lt;/strong&gt;To evaluate the filling quality of single cone obturation in root canal model with irregular structure (Hus&Kim Ⅴ, Yin Ⅱ-type isthmus) which established by 3D printing technology using slices and radiographic methods, in order to provide reference for clinical practice.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Methods: &lt;/strong&gt;(1) Extracted fresh premolars with Hus&Kim Ⅴ and Yin-type Ⅱ isthmus were collected and scanned by cone-beam computed tomography (CBCT), then standard root canal models were designed and printed. Rhodamine B staining and bias fitting were used to verify the availability of the models. (2) 30 root canal models were randomly divided into 3 groups according to different filling methods (&lt;i&gt;n&lt;/i&gt;=10).&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Control group: &lt;/strong&gt;vertical compaction obturation; Experimental group 1: single cone obturation with 0.06-taper cone (30#); Experimental group 2: single cone obturation with 0.04-taper cone (35#), GuttaFlow 2 as canal sealers. Slices were taken at 2, 4, 6, and 8 mm from the root apex in the direction perpendicular to the long axis of the root and observed under a stereomicroscope to calculate the percentage of filling area (PAV), percentage of gutta-percha-filled area (PGFA), percentage of sealer filled area (PSFA). (3) On the basis of the above results, two groups (&lt;i&gt;n&lt;/i&gt;=4) were selected to further analyze the filling quality by micro-computed tomography (Micro-CT), the filling volume of main root canal and the isthmus were obtained, and the percentage of filling volume (PFV) was calculated. Two-way ANOVA was used to evaluate the differences between the groups, and Tukey' s multiple comparison was used to compare the data between the groups and within the groups.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;(1) Rhodamine B staining solution could overflow the apical foramen, and the main root canal system and the isthmus area were stained, showed no remnants of support material. The 3D standard deviation of the printed model data was 0.03 mm, and the average fitting distance was 0.02 mm. (2) The PFA of the two experimental groups were both significantly lower than that of the control group (&lt;i&gt;F&lt;/i&gt;=45.04, &lt;i&gt;P&lt;/i&gt; &lt; 0.01). There was no statistical difference of the PFA at apical 2 and 4 mm between the two experimental groups (&lt;i&gt;P&lt;/i&gt;&gt;0.01), but at the middle and coronal portions of the root canal (6, 8 mm), the PFA of the experimental group 1 was higher than that of the experimental group 2 (&lt;i&gt;P&lt;/i&gt; &lt; 0.01). PFA in the apical 2, 4 mm of the two experimental groups were both lower than that in the middle and coronal portions 6, 8 mm of the canal (&lt;i&gt;P&lt;/i&gt; &lt; 0.01). There was no difference in the PGFA and PSFA between the two experimental groups at the apical 2, 4 mm (&lt;i&gt;F&lt;/i&gt;=2.383, &lt;i&gt;P&lt;/i&gt;&gt;0.01). (3) The results of Micro-CT showed that the PFV of the experimental group 1 was statistically different with the control group (&lt;i&gt;F&lt;/i&gt;=47.33, &lt;i&gt;P&lt;/i&gt; &lt; 0.01). The PFV of the experimental group 1 was 54.33%±4.35% in the","PeriodicalId":8790,"journal":{"name":"北京大学学报（医学版）","volume":"57 2","pages":"369-375"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11992436/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143960031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Effect of intraoperative blood salvage autotransfusion on the prognosis of patients after carotid body tumor resection].","authors":"Weihao Li, Jing Li, Xuemin Zhang, Wei Li, Qingle Li, Xiaoming Zhang","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Objective: </strong>To investigate the effect of intraoperative blood salvage autotransfusion on local recurrence and long-term metastasis of patients after carotid body tumor resection.</p><p><strong>Methods: </strong>We retrospectively reviewed a consecutive series of 61 patients undergoing elective carotid body tumor resection from August 2009 to December 2020. Among them, 14 received intraoperative blood salvage autotransfusion (autotrasfusion group) and 47 did not (non-autotransfusion). Data of general information, surgical status and postoperative follow-up results were collected.</p><p><strong>Results: </strong>The proportion of Shamblin Ⅲ in the autotransfusion group was 85.7%, which was significantly higher than 31.9% in the non-autotransfusion group (<i>P</i>=0.003). The average operation time of the 14 patients in the autotransfusion group was (264±84) min, intraoperative blood loss was 1 200 (700, 2 700) mL, and autologous blood transfusion was 500 (250, 700) mL. Of these, 8 patients (57%) required concomitant allogeneic blood with 400 (260, 400) mL of allogeneic blood. The average operation time of the 47 patients in the non-autotransfusion group was (153±75) min, and the intraoperative blood loss was 300 (100, 400) mL. Of these, 6 (13%) required allogeneic blood transfusion, and 520 (400, 520) mL of allogeneic blood was used. Compared with the non-autotransfusion group, the average operation time in the autologous blood transfusion group was significantly longer (<i>P</i> < 0.001), and the intraoperative blood transfusion volume was larger (<i>P</i>=0.007). Of the 14 patients undergoing autotransfusion, 8 (57%) needed allogeneic blood at the same time; while in the 47 non-autologous transfusion patients, 6 (13%) needed allogeneic blood transfusion. The proportion of autotransfusion group using allogeneic blood at the same time was even higher (<i>P</i>=0.002). The incidence of nerve injury within 30 days after surgery was 29.5%, and there was no significant difference between the two groups. No early deaths occurred. The average follow-up was (76±37) months. One case of local recurrence occurred in the non-autotransfusion group. There was no distant metastasis. There were no tumor-related deaths. The estimated 5-year and 10-year overall survival rates were 96.4% and 83.8%, respectively. There was no significant difference in overall survival between the two groups (<i>P</i>=0.506).</p><p><strong>Conclusion: </strong>The use of intraoperative blood salvage autotransfusion increased no risk of local recurrence and distant metastasis in patients with carotid body tumor, which is safe and effective in carotid body tumor resection.</p>","PeriodicalId":8790,"journal":{"name":"北京大学学报（医学版）","volume":"57 2","pages":"272-276"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11992442/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143961004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Abnormal elevation of growth hormone in patients with pituitary adenoma combined with cirrhosis: A case report].","authors":"Yanlei Wang, Min Duan, Jianzhong Xiao, Wenhui Zhao","doi":"","DOIUrl":"","url":null,"abstract":"&lt;p&gt;&lt;p&gt;The oral glucose growth hormone suppression test is commonly used in the clinical diagnosis of acromegaly, but its results can be influenced by a variety of factors. This case report discusses a patient with a pituitary tumor and concurrent liver cirrhosis, highlighting the complexities in interpreting test results under such conditions. The patient, a 54-year-old male, presented with blurred vision as his primary complaint. Notably, the physical examination revealed no changes in facial features, no enlargement of hands or feet, and no other symptoms typically associated with acromegaly, which might otherwise suggest excessive growth hormone activity. Magnetic Resonance Imaging (MRI) of the pituitary gland indicated that the gland was within normal size parameters, but a small low-intensity lesion mea-suring approximately 3 mm×2 mm identified. This finding was consistent with a pituitary microadenoma. The patient's fasting growth hormone levels were significantly elevated at 8.470 μg/L, compared with the normal range of less than 2.47 μg/L. Conversely, fasting insulin-like growth factor-1 (IGF-1) levels were notably low, recorded at 41 and 52 μg/L, whereas the normal range for a person of his age was between 87 and 234 μg/L. Other pituitary hormones, including those regulating the thyroid, adrenal cortex, and sex hormones, were found to be within normal ranges. Despite this, during the glucose growth hormone suppression test, an abnormal elevation of growth hormone was observed. To investigate further, the patient was administered branched-chain amino acids, and the suppression test was repeated. However, the abnormal elevation of growth hormone persisted, indicating a failure to normalize the response. Given the patient's lack of clinical signs typically associated with elevated growth hormone secretion, the history of liver cirrhosis became a significant consideration. The disparity between elevated growth hormone levels and reduced IGF-1 levels suggested that the pituitary lesion was a non-functional adenoma rather than a source of excess hormone production. Consequently, it was concluded that the abnormal response of growth hormone to the glucose suppression test was likely related to the patient's liver cirrhosis. In addition to chronic liver disease, various other conditions could influence the results of the oral glucose tolerance growth hormone suppression test. According to the literature, factors such as puberty, diabetes, anorexia nervosa, and protein malnutrition could also affect test outcomes. These conditions could cause similar abnormalities in growth hormone dynamics, complicating the diagnosis. Therefore, clinicians must be vigilant and consider these potential influences when interpreting test results.For an accurate diagnosis of acromegaly, it is essential to combine clinical symptoms, detailed medical history, and imaging studies. The presence of conditions like liver cirrhosis should prompt careful interpretation of t","PeriodicalId":8790,"journal":{"name":"北京大学学报（医学版）","volume":"57 2","pages":"400-402"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11992449/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143961184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[A temporary trauma team established in primary hospital for disaster rescue].","authors":"Zhenzhou Wang, Xiujuan Zhao, Fuzheng Guo, Fengxue Zhu, Tianbing Wang","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Objective: </strong>To explore the feasibility of establishing a temporary trauma team led by trauma experts in primary hospitals for disaster medical rescue.</p><p><strong>Methods: </strong>In the coal mine flooding accident in Xiaoyi City, Shanxi Province on December 15, 2021, according to the local emergency plan and the characteristics of the accident, the trauma experts trained the medical staff from the local primary hospital on advanced trauma life support (ATLS) and damage control surgery (DCS) in the short time interval between the occurrence of the mine disaster and the admission of medical staff to the disaster scene. A temporary trauma team composed of trauma experts, ATLS team, and DCS team was formed to provide early diagnosis and treatment for survivors before and in the hospital.</p><p><strong>Results: </strong>The miners were found on the 36th hour of the disaster. All 22 miners were male, and 2 died underground. Another 20 people were rescued 39－43 hours after the disaster, with a median age of 48 years (34-57 years). All the survivors suffered from hypothermia, dehydration, maceration of feet and other injuries. There were 18 cases of acute inhalation tracheobronchitis, 14 cases of electrolyte acid-base disturbance, 6 cases of trunk contusion, 1 case of psoas major hematoma, and 1 case of lower extremity hematoma. Deep vein thrombosis was in 4 cases. The ATLS team focused on injury assessment, rewarming and rehydration within 50－60 minutes before admission, and completed auxiliary examinations within 2 hours after admission to clarify the diagnosis. The DCS team evaluated 6 patients with mechanical blunt trunk injury and excluded the indication of emergency surgery. The trauma experts conducted the whole process of supervision and quality control of disaster rescue. The positive rate of capillary refill test in the all survivors at the third hour of admission was significantly lower than that immediately after being rescued (75.0% <i>vs.</i> 15.0%, <i>P</i>=0.000 3), and they were discharged 4－7 days after admission.</p><p><strong>Conclusion: </strong>Under the leadership of trauma experts and relying on the medical staff of primary hospitals, it is feasible to establish and train a temporary trauma team with ATLS and DCS functions to participate in the medical rescue of disasters, which is in line with the current national conditions of China.</p>","PeriodicalId":8790,"journal":{"name":"北京大学学报（医学版）","volume":"57 2","pages":"323-327"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11992455/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143964652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Impact of concurrent use of goserelin on the efficacy of neoadjuvant chemotherapy in young breast cancer patients].","authors":"Miaoyu Liu, Siyuan Wang, Lin Pei, Shu Wang","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Objective: </strong>To explore the effect of concurrent administration of goserelin for ovarian function protection on the pathological complete response (pCR) rate and objective response rate (ORR) of neoadjuvant chemotherapy (NAC) in young breast cancer patients.</p><p><strong>Methods: </strong>The study enrolled breast cancer patients aged 18-45 with clinical stages ⅡA~ⅢC from January 2016 to May 2020. According to patients' willingness, they were divided into two groups: Those who chose to receive goserelin to protect ovarian function during NAC (goserelin group) and those who did not (chemotherapy group). The pCR rate and ORR were compared between the two groups, and subgroup analysis was conducted for patients with different molecular subtypes.</p><p><strong>Results: </strong>A total of 93 patients were included in this study (31 in the goserelin group and 62 in the chemotherapy group). After propensity score weighting (PSW) adjustment, baseline data such as age, preoperative clinical stage, postoperative pathological stage, pa-thological type, hormone receptor status, human epidermal growth factor receptor 2 (HER2) and Ki-67 expression, molecular subtypes, and chemotherapy regimens were well-matched between the two groups. There was no significant difference in the pCR rate between the goserelin group and the chemotherapy group, with rates of 29.0% and 25.8%, respectively (<i>P</i>=0.741). Similarly, there was no significant difference in ORR between the two groups (90.3% <i>vs</i>. 87.1%, <i>P</i>=0.746). Subgroup analysis revealed that among the patients with hormone receptor-positive tumors, there were no significant differences in pCR rate (6.3% <i>vs</i>. 7.7%, <i>P</i>=0.852) or ORR (87.5% <i>vs</i>. 82.1%, <i>P</i>=0.839) between the goserelin and chemotherapy groups. Among the patients with hormone receptor-negative tumors, there were also no significant differences in pCR rate (53.3% <i>vs</i>. 56.5%, <i>P</i>=0.847) or ORR (93.3% <i>vs</i>. 95.7%, <i>P</i>=0.975) between the two groups. One year after the completion of chemotherapy, the incidence of chemotherapy-induced amenorrhea (CIA) was significantly lower in the goserelin group compared with the chemotherapy group (9.5% <i>vs</i>. 33.3%, <i>P</i>=0.036).</p><p><strong>Conclusion: </strong>For young breast cancer patients with clinical stages of ⅡA~ⅢC, there was no statistical difference in pCR rate and ORR whether or not using goserelin during NAC. However, it is still necessary to expand the sample size and carry out a longer follow-up to evaluate the effect of goserelin on the long-term survival of young patients.</p>","PeriodicalId":8790,"journal":{"name":"北京大学学报（医学版）","volume":"57 2","pages":"291-297"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11992451/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143956185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Correlation analysis of peri-implant health after single-tooth dental implant].","authors":"Fangru Lin, Zhihui Tang","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Objective: </strong>To observe the long-term health condition of the single-tooth dental implant at the first molar site, and to evaluate the related factors affecting the peri-implant health.</p><p><strong>Methods: </strong>In this study, 82 patients who were treated in the Second Clinical Division, Peking University School and Hos-pital of Stomatology from January 2008 to December 2020 were enrolled. Peri-implant tissue conditions were assessed by clinical and radiographic examination. The peri-implant probing depth (PPD), modified sulcus bleeding index (mSBI), modified plaque index (mPLI) and papilla index (PI) were recorded for 278 implants. The X-ray analysis included the restoration emergence angle (REA), the clinical crown-implant ratio (cC/I), the horizontal tooth-implant distance (HTID), the contact point level (CPL) and the embrasure surface area (ESA), etc. Kruskal-Wallis rank sum test and generalized estimation equation were used for statistical analysis.</p><p><strong>Results: </strong>The average age of the patients was (40.2±9.5) years (19 to 84 years), with 33 males and 49 females. The follow-up time was (4.9±3.3) years (1 to 10 years). According to the diagnostic criteria in 2018, the prevalence of peri-implantitis in this study was 14.03% on the implant level and 21.95% on the patient level. The peri-implant health rate was 19.06% on the implant level and 18.29% on the patient level. The prevalence of peri-implant mucositis was 66.91% on the implant level and 59.75% on the patient level. At the baseline, there were statistically significant differences between the peri-implant health group and peri-implantitis group in PPD, distal HTID and mesial/distal CPL, cC/I (<i>P</i> < 0.05), while there was no statistically significant difference in mSBI, mPLI, PI, mesial HTID, mesial/distal REA and mesial/distal ESA between the two groups. Among the differences between follow-up and baseline, there were statistically significant dif-ferences between the two groups in PPD, mesial/distal HTID, mesial/distal CPL and mesial/distal ESA (<i>P</i> < 0.05). Generalized estimation equation showed that PPD, mesial/distal HTID, mesial CPL, and mesial ESA had significant positive correlations with the risk of peri-implantitis in the difference between baseline and follow-up.</p><p><strong>Conclusion: </strong>Based on the results of this study, the peri-implant health rate is still unsatisfied, and the PPD, HTID, CPL, ESA may be related to the long-term health of the implant.</p>","PeriodicalId":8790,"journal":{"name":"北京大学学报（医学版）","volume":"57 2","pages":"347-353"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11992440/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143961642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Pregnancy complicated by patent urachus: A case report].","authors":"Junjuan Yang, Lei Zhang, Yan Zhang","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>To improve clinicians' understanding, and to explore the diagnosis and treatment of pregnancy complicated with patent urachus. The clinical symptoms, ultrasound images, and delivery outcome of the pregnancy complicated with patent urachus were reported, and the literature was reviewed. The patient had umbilical leakage as a young child occasionally, the symptom of leakage was not obvious after she was 10 years old, and there was no asymptomatic before pregnancy and in the first and second trimesters. Umbilical leakage was present at gestational 33 weeks, and ultrasound showned a tubular structure (0.7 cm in width) was connected between the top of the bladder and the umbilicus, and there was anechoic areas inside. The pregnancy complicated with patent urachus was diagnosed. The patient was checked regularly, and kept the umbilicus clean and dry. Premature rupture of membranes occured at gestational 39 weeks 4 days. The patient was admitted to the obstetrics department, and she deliveried finally. After delivery, the symptoms of umbilical leakage urine relieved, and an elective resection of abnormal urachus was planned. The patent urachus creates a tube connection between the umbilicus and the anterosuperior wall of the bladder, it was termed an median umbilical ligament at birth as usual, which still communicated with the bladder after birth. The main clinical manifestations were umbilical leak and infection, which were the main diagnostic basis. Ultrasound, CT and MRI were important auxi-liary examination methods.The patients with symptoms in the neonatal and early childhood period were managed actively and had the potential for self resolution, especially for the children younger than 1 year. Therefore, patients under 1 year of age were offered surgery only if they had recurrent infections or failed to selfresolve. It is recommended to remove abnormal urachus before pregnancy for the women complica-ted with patent urachus. If the patent urachus was found during pregnancy, the umbilicus should be kept clean and dry to avoid infection. The pregnancy complicated with patient urachus is not contraindicated to vaginal delivery.</p>","PeriodicalId":8790,"journal":{"name":"北京大学学报（医学版）","volume":"57 2","pages":"393-395"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11992454/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143967963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Classical Sweet syndrome with multiple organ lesions by ¹⁸F-FDG PET/CT: A case report].","authors":"Zhao Chen, Yongkang Qiu, Lei Kang","doi":"","DOIUrl":"","url":null,"abstract":"&lt;p&gt;&lt;p&gt;Sweet syndrome (acute febrile neutrophilic dermatosis) is a relatively rare inflammatory di-sease, which is characterized by the sudden appearance of tender erythematous skin lesions, often accompanied by pyrexia and elevated neutrophil count. The pathogenesis is not clear yet. Recently, multiple studies have found the association between Sweet syndrome and infections, autoimmune diseases, malignant tumors and the application of multiple drugs. According to different causes, Sweet syndrome can be divided into three types: classical (or idiopathic) Sweet syndrome, malignancy-associated Sweet syndrome and drug-induced Sweet syndrome. Classical Sweet syndrome usually presents in women between the age of 30 to 50 years and may be related to infection, inflammatory bowel disease, or pregnancy. The clinical symptoms typically respond promptly after corticosteroid therapy. The major diagnostic criteria of classical Sweet syndrome include sudden painful erythematous skin lesions, histopathologic evidence of a dense neutrophilic infiltrate without evidence of leukocytoclastic vasculitis; minor criteria include pyrexia over 38 ℃, association with hematologic or visceral malignancies, inflammatory diseases, pregnancy or preceded by infection, prompt response to systemic glucocorticoid or potassium iodide treatment, abnormal laboratory values (three of four: erythrocyte sedimentation rate &gt;20 mm/h, positive C-reactive protein, &gt;8.0×10&lt;sup&gt;9&lt;/sup&gt;/L leukocytes, &gt;70% neutrophils). The presence of both major criteria and two of the four minor criteria are required to diagnose classical Sweet syndrome. As for the malignancy-associated Sweet syndrome, skin lesions can be found precede, follow, or at the same time with the diagnosis of hematologic malignancy or a solid tumor. At present, &lt;sup&gt;18&lt;/sup&gt;F-fluorodeoxyglucose (&lt;sup&gt;18&lt;/sup&gt;F-FDG) is commonly used as a positron emission tomography computed tomography (PET/CT) imaging agent for diagnosing and screening malignant tumors. Therefore, most of the case reports on the &lt;sup&gt;18&lt;/sup&gt;F-FDG PET/CT manifestations of Sweet syndrome are malignancy-associated. Even classical Sweet syndrome is often accompanied by inflammatory bowel disease, autoimmune diseases, &lt;i&gt;etc&lt;/i&gt;. Therefore, for patients with suspected or confirmed Sweet syndrome, it is necessary to take &lt;sup&gt;18&lt;/sup&gt;F-FDG PET/CT examination to clarify the general condition, whether it is for patients with malignant signs such as elevated tumor markers values and weight loss, or for patients with classical Sweet syndrome to exclude underlying inflammatory diseases. &lt;sup&gt;18&lt;/sup&gt;F-FDG PET/CT is often able to detect the solid tumor early, and assess the degree of hematologic malignancy and inflammatory disease. This study reported a classical Sweet syndrome case associated with inflammatory bowel disease, which was confirmed with skin and intestinal histological examination. The clinical manifestations, laboratory values, &lt;sup&gt;18&lt;/sup&gt;F-FDG PET/CT manifes","PeriodicalId":8790,"journal":{"name":"北京大学学报（医学版）","volume":"57 2","pages":"403-407"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11992453/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143959124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}