Forensic pathology

法医病理学
  • 文章类型: Journal Article
    背景和目的:本研究对来自单个中心的26例尸检病例进行了回顾性分析,主要集中在法医案件上,与大多数男性个体。材料和方法:我们使用苏木精-伊红染色和CD3,CD163和IL-6的免疫组织化学系统地分析了尸检报告和心脏组织切片。组织学评估评估了关键变量,如炎症严重程度,坏死,和使用标准化评分系统的背景变化。进行了免疫组织化学标记的定量分析,计算炎症浸润物中阳性染色细胞的百分比。结果:平均年龄51.6岁,稍微偏向年长的雄性。死亡人数差异很大,猝死和药物滥用是与组织学检查发现心肌炎相关的最常见病症。发现炎症的严重程度(通过心肌切片内的大小测量)与基于每个切片的炎症灶数量的评分系统之间存在很强的相关性(p≤0.001)。大多数病例显示轻度至轻度纤维化,一些表现出中度至重度纤维化,动脉硬化,和肌细胞肥大。炎症浸润中蛋白CD3的存在揭示了CD3值与炎症和坏死的严重程度之间的中度负相关。与中性粒细胞水平呈强烈的负相关。CD3水平在猝死病例中较高,在有许多炎症灶的病例中较低。强调淋巴细胞性心肌炎的谨慎性质。巨噬细胞的存在,使用CD163评估,显示与中性粒细胞水平呈中度负相关,猝死与非猝死病例之间存在显着差异。在肺炎/支气管肺炎相关病变的病例中观察到富含巨噬细胞的炎症。IL-6表达与炎症严重程度呈中度直接相关(p=0.028),坏死的严重程度(p=0.005),和每个切片的炎症灶数量(p=0.047)。在CD3和IL-6表达之间发现中度负相关(p=0.005)。结论:这些发现强调了在心肌炎的法医病例中需要一种独特的免疫组织化学方法,由于不同的炎症细胞,与心内膜活检指南不同。该研究建议探索心肌炎病灶内的炎性趋化因子在临床情景中的意义。具体来说,IL-6,一种至关重要的促炎白细胞介素,炎症和坏死的严重程度显著相关(p<0.05)。这项研究为尸检病例中心肌炎的组织病理学和免疫学标志物提供了新颖而有价值的见解。
    Background and Objectives: This study presents a retrospective analysis of 26 autopsy cases from a single centre, primarily focusing on forensic cases, with a majority of male individuals. Materials and Methods: We systematically analysed autopsy reports and cardiac tissue slides using haematoxylin-eosin stain and immunohistochemistry for CD3, CD163, and IL-6. The histological assessment evaluated key variables such as inflammation severity, necrosis, and background changes using a standardised grading system. Quantitative analysis of immunohistochemical markers was performed, calculating the percentage of positively stained cells within the inflammatory infiltrate. Results: The average age was 51.6 years, slightly skewed towards older males. The fatalities varied widely, with sudden death and drug abuse being the most common conditions linked to myocarditis findings on histological examination. A strong correlation was found between the severity of inflammation (measured by size within a myocardium section) and the scoring system based on the number of inflammatory foci per section (p ≤ 0.001). Most cases showed mild to minimal fibrosis, with some exhibiting moderate to severe fibrosis, arteriosclerosis, and myocyte hypertrophy. The presence of protein CD3 in the inflammatory infiltrate revealed a moderate inverse correlation between the CD3 values and the severity of inflammation and necrosis, and a strong inverse correlation with neutrophil levels. CD3 levels were higher in sudden death cases and lower in cases with numerous inflammatory foci, highlighting the discreet nature of lymphocytic myocarditis. Macrophage presence, assessed using CD163, showed a moderate inverse correlation with neutrophil levels and significant differences between sudden death and non-sudden death cases. Macrophage-rich inflammation was observed in cases with pneumonia/bronchopneumonia-associated lesions. IL-6 expression showed a moderate direct correlation with inflammation severity (p = 0.028), severity of necrosis (p = 0.005), and the number of inflammatory foci per section (p = 0.047). A moderate inverse correlation was found between CD3 and IL-6 expression (p = 0.005). Conclusions: These findings highlight the need for a unique immunohistochemical approach in forensic cases of myocarditis, differing from guidelines for endomyocardial biopsies due to diverse inflammatory cells. The study suggests exploring inflammatory chemokines within myocarditis foci for their significance in clinical scenarios. Specifically, IL-6, a crucial pro-inflammatory interleukin, correlated significantly with the severity of inflammation and necrosis (p < 0.05). This study provides novel and valuable insights into the histopathological and immunological markers of myocarditis in autopsy cases.
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  • 文章类型: Journal Article
    研究大鼠脑组织EPMI中lncRNAs的降解,本研究为EPMI的估计提供了新的方向。在0h和24h对失血性休克模型大鼠脑组织进行LncRNA高通量测序,并筛选靶lncRNAs。收集死亡后0、1、3、6、12、18和24小时的样品,miRNA-9和miRNA-125b用作参考基因。通过RT-qPCR检测每个PMI中lncRNAs的相对表达水平,并建立了涉及lncRNAs和EPMI的功能模型。在死亡后6、9、15和21小时收集样品用于功能模型验证。几个lncRNAs的表达随着EPMI的延长而降低,由多个lncRNA指数建立的数学模型表现出良好的拟合。多指标联合函数模型的验证结果明显优于单指标函数模型,所建立的模型更具实用性。lncRNAs和EPMI之间存在线性关系,多指标函数模型显著优于单指标函数模型,这对于法医病理学实践中的EPMI推断很重要。
    To study the degradation of lncRNAs in EPMI in rat brain tissue, this study provides a new direction for the estimation of EPMI. LncRNA high-throughput sequencing was performed on the brain tissues of hemorrhagic shock model rats at 0 h and 24 h, and the target lncRNAs were screened. Samples at 0, 1, 3, 6, 12, 18 and 24 h after death were collected, and miRNA-9 and miRNA-125b were used as reference genes. The relative expression levels of lncRNAs at each PMI were detected by RT-qPCR, and a functional model involving lncRNAs and EPMI was established. Samples were collected at 6, 9, 15, and 21 h after death for functional model verification. The expression of several lncRNAs decreased with the prolongation of EPMI, and the mathematical model established by several lncRNA indices exhibited good fit. The verification results of the multi-index joint function model are significantly better than those of the single-index function model, and the established model is more practical. There is a linear relationship between lncRNAs and EPMI, and the multi-index function model is significantly better than the single-index function model, which is important for EPMI inference in forensic pathology practice.
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    文章类型: Journal Article
    雪崩死亡在捷克共和国非常罕见。由于两个捷克山脉中存在雪崩场,一些法医部门的法医病理学家可能会遇到这种意外死亡的特定机制。作者总结了1993年至2015年期间捷克共和国境内雪崩死亡的法医学方面。在研究期间记录了十例雪崩死亡。研究小组由9名男性和1名女性受害者组成。死者的平均年龄为27.9岁。滑雪者或滑雪登山者在雪崩中死亡5例(50%),登山者中有两种情况(20%),单板滑雪者在一个案例中(10%),越野滑雪者在一个案例中(10%),在一个案例中,这是儿童在雪山上玩耍的死亡(10%)。死亡原因是4例(40%)窒息,钝性外伤4例(40%),在其余两个案例中,被困人员在医院的雪崩中获救数小时后得以幸存;两名受害者随后因长期窒息和体温过低而长期休克(20%)死亡。从雪崩坠落到被困人员获救的时间间隔在几分钟到3小时之间。在任何研究病例中均未检测到酒精或药物的存在。
    Avalanche fatalities are quite rare in the Czech Republic. Due to the presence of avalanche fields in the two Czech mountains, forensic pathologists at some forensic medicine departments may encounter this specific mechanism of accidental death. The authors summarize medicolegal aspects of deaths in avalanches in the territory of the Czech Republic for the twenty-three-year period between 1993-2015. Ten avalanche fatalities were recorded during study period. The studied group consisted of nine male and one female victims. The average age of the deceased was 27.9 years. Skiers or ski-alpinists died in the avalanche in five cases (50%), climbers in two cases (20%), snowboarders in one case (10%), cross-country skiers in one case (10%) and in one case it was a fatality of child playing on a snowy hill (10%). The cause of death was suffocation in four cases (40%), blunt trauma in four cases (40%), and in the remaining two cases it was the survival of trapped persons several hours after being rescued from the avalanche in the hospital; both victims subsequently died as a result of prolonged shock (20%) due to a combination of prolonged suffocation and hypothermia. The time interval from the fall of the avalanche to the rescue of the trapped person was in the range of minutes to 3 hours. The presence of alcohol or drugs was not detected in any studied case.
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  • 文章类型: Case Reports
    在法医调查中使用放射学方法正在迅速成为传统尸检的替代方法。这里,我们介绍西西里和卡拉布里亚法医部门在过去五年中的经验,强调PMCT在涉及枪伤受害者的病例中支持尸检的应用。
    从2020年1月至2024年3月,30名死于枪伤的尸体接受了全身PMCT检查,随后进行了尸检。检查包括多平面和3D重建。为每个受试者收集的数据包括性别,年龄,死亡模式,类型的武器,射击次数,身体部位受影响,以及保留子弹的存在。由两名放射科医生和两名法医组成的团队评估了图像,并将其与尸检结果进行了比较。
    PMCT和3D重建能够评估进入伤口,骨折边缘,损伤部位,碎片,和解剖学轨迹。将PMCT的结果与尸检结果在进入伤口方面进行了比较,伤口通道,异物,器官和骨骼损伤,和死亡原因。PMCT在确定所有病例的死亡原因方面与尸检结果一致。速度,非侵入性,以及操纵和重建数据的能力使PMCT成为支持法医调查和尸检的理想技术。PMCT对于准确识别致命伤口和确定死亡原因非常可靠。它擅长跟踪伤口路径,区分入口和出口伤口,定位保留的子弹,并检测弹道成分的碎裂和分散。
    UNASSIGNED: The use of radiological approaches in forensic investigations is rapidly emerging as an alternative to traditional autopsies. Here, we present the experience of the Sicilian and Calabrian forensic medical departments over the past five years, highlighting the application of PMCT to support autopsies in cases involving gunshot wound victims.
    UNASSIGNED: From January 2020 to March 2024, thirty cadavers who died from gunshot wounds underwent total body PMCT examinations followed by autopsies. The examinations included multi-planar and 3D reconstructions. Data collected for each subject included gender, age, mode of death, type of weapon, number of shots, body sites affected, and presence of retained bullets. A team of two radiologists and two forensic physicians evaluated the images and compared them with the autopsy findings.
    UNASSIGNED: PMCT and 3D reconstruction enabled evaluation of entry wounds, fracture margins, injury sites, fragments, and anatomical trajectories. The results from PMCT were compared with autopsy findings in terms of entry wounds, wound channels, foreign bodies, organ and skeletal injuries, and causes of death. PMCT showed concordance with autopsy findings in determining the cause of death in all cases. The speed, non-invasiveness, and ability to manipulate and reconstruct data make PMCT an ideal technique for supporting forensic investigations and autopsies. PMCT is highly reliable for accurately identifying lethal wounds and determining the cause of death. It excels at tracking wound paths, distinguishing entrance and exit wounds, locating retained bullets, and detecting fragmentation and dispersion of ballistic components.
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  • 文章类型: Journal Article
    分析,信息的解释和存储委托给个人专家,他的判断是基于经验所产生的知识。这项实验研究的目的是分析和介绍适用于法医病理学的新研究路线,基于使用人工智能技术作为数据收集和分析的可能工具。
    分析的样本由2020年1月1日至2021年12月31日在卡坦扎罗大学进行的司法调查代表。对于每种情况,都进行了:医疗记录研究;尸检;组织学检查;血液样本的毒理学分析。连续变量表示为平均值±标准偏差,分类变量以百分比表示。建立了随机森林回归模型,作为一种机器学习方法,评估个体实体器官重量变量在预测死亡原因中的重要性。
    这项研究旨在评估尸检数据,以帮助描述和研究法医案例,使用机器学习方法。迄今为止,这项研究似乎是第一个评估器官重量以预测死亡原因的研究。人工智能技术是解决法医困境的最佳解决方案。这项研究的结果表明,可以使用机器学习技术提交常规数据,以确定提供与死亡原因预测有关的更多信息的程序的关键要素。
    UNASSIGNED: The analysis, interpretation and storage of information is entrusted to the individual expert, who bases his judgments on the knowledge resulting from the experience. The aim of this experimental study is to analyse and introduce a new line of research applicable to forensic pathology, based on the use of artificial intelligence techniques as a possible tool for data collection and analysis.
    UNASSIGNED: The sample analysed is represented by judicial autop-sies performed at the University of Catanzaro from 01/01/2020 to 31/12/2021. For each case were performed: study of medical records; autopsy; histological examinations; toxicological analysis of blood samples. Continuous variables were presented as means ± standard deviations, and categorical variables were expressed as percentages. A random forest regression model was conducted, as a machine learning approach, to estimate the importance of individual solid organ weight variables in predicting cause of death.
    UNASSIGNED: This study aimed to evaluate autopsy data to aid in the description and study of forensic cases, using a machine learning approach. To date, this study appears to be the first to evaluate the weight of organs in predicting a cause of death. Artificial intelligence techniques are an optimal solution in solving forensic dilemmas. The results of this study demonstrate that routine data can be submitted using machine learning techniques in order to identify key elements of procedures that provide more information in relation to the predic-tion of cause of death.
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  • 文章类型: Journal Article
    目标:尽管有1988年的“邓迪倡议”,最大限度地利用视图和授权检查来降低Tayside的侵入性法医尸检率,观点和授予本身仍然存在争议。这是第一项衡量对观点和赠款的态度的研究,应用计划行为理论来调查持有的态度,他们背后的原因以及他们与决定验尸范围的联系。
    方法:一项混合方法横断面研究检查了62位英国病理学家,验尸官和检察官使用在线问卷进行财务调查。在将五个虚构的可报告死亡分配给视图和授予或侵入性法医尸检(在理想和现实世界的条件下)之前,询问参与者的人口统计学和对观点和授予的态度,使用自由文本解释他们的决定。
    结果:参与者对观点和赠款持有积极和消极态度,大多数人相对强壮和矛盾。态度预测受访者在所有理想情况下都会做出有利于观点和授予或侵入性法医尸检的决定,但没有现实世界的场景。在比较病理学家和司法人员时,态度和决定有显著差异,以及在验尸官和财政系统工作的受访者。对自由文本答复进行了专题分析。
    结论:态度之间的差异,理想和现实世界的选择表明,受访者想要做的不一定会转化为他们在测试场景中实际做的事情。运用态度的概念,规范和感知控制可以帮助理解死亡调查人员的决策,以及为什么一些司法管辖区赞成更具侵入性的程序。
    OBJECTIVE: Despite the 1988 \'Dundee Initiative\', which maximised the use of view and grant examinations to reduce the invasive forensic autopsy rate in Tayside, the view and grant itself remains controversial. This is the first study to measure attitudes towards view and grants, applying the Theory of Planned Behaviour to investigate what attitudes are held, the reasons behind them and their association with deciding the scope of postmortem examinations.
    METHODS: A mixed-methods cross-sectional study examined 62 UK pathologists, coroners and procurators fiscal using an online questionnaire. Participants were asked their demographics and attitudes towards view and grants before allocating five fictitious reportable deaths to either view and grant or invasive forensic autopsy (both in ideal and real world conditions), explaining their decisions using free-text.
    RESULTS: Participants held both positive and negative attitudes towards view and grants, and most were relatively strong and ambivalent. Attitudes predicted respondents\' decisions to favour view and grant or invasive forensic autopsy in all ideal world scenarios, but no real world scenarios. There were significant differences in attitudes and decisions when comparing pathologists and judicial officers, and respondents working in Coroner and Fiscal systems. Thematic analysis was conducted on free-text responses.
    CONCLUSIONS: Discrepancies between attitudes, and ideal and real world choices suggest that what respondents wanted to do did not necessarily translate to what they would actually do in the scenarios tested. Applying concepts of attitudes, norms and perceived control can help to understand decision-making by death investigators, and why some jurisdictions favour more invasive procedures.
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  • 文章类型: Journal Article
    背景:心律失常性猝死综合征(SADS),尸检时死因不明或不确定,加上阴性或非致命性毒理学筛查,是35岁以下受害者心脏性猝死(SCD)的最常见原因。SADS的完全因果关系尚不清楚,药物是潜在的危险因素。
    目的:为了描述SADS受害者的毒理学特征,专注于心律失常药物,药物水平,和多药房。
    方法:丹麦2000-2019年1-35岁和2007-2019年36-49岁的所有死亡都通过死亡证明进行了检查。国家登记册,和毒理学检查的尸检报告.我们通过尸检调查了所有突然意外死亡的受害者,在死因不明或不确定的地方,包括阴性或非致命性药物发现(SADS)。
    结果:我们确定了477名SADS受害者;313名(66%)的毒理学筛查呈阳性(裁定为非致命性),平均2.8种药物/例。毒理学筛查阳性的SADS受害者中,有一半以上存在QT延长或布鲁金类药物。多元化药物占66%,37%的精神药物复方,以及22%的QT延长多药,最常见的整体和QT延长药物组合是抗精神病药和精神敏感药。QT延长药物比非QT延长药物更常见于超病理学水平。
    结论:大多数SADS人群的毒理学呈阳性,相当大的比例有致心律失常药物和多重用药。这凸显了未来需要关注药物作为SADS的危险因素。
    BACKGROUND: Sudden arrhythmic death syndrome (SADS), characterized by an unknown or inconclusive cause of death at autopsy together with a negative or nonlethal toxicology screening result, is the most common cause of sudden cardiac death in victims younger than 35 years. The complete causality of SADS remains unclear, with drugs being a potential risk factor.
    OBJECTIVE: This study aimed to describe the toxicologic profiles of SADS victims, focusing on proarrhythmic drugs, drug levels, and polypharmacy.
    METHODS: All deaths in Denmark of those aged 1-35 years in 2000-2019 and 36-49 years in 2007-2019 were examined through death certificates, national registries, and autopsy reports with toxicology screenings. We investigated all sudden unexpected death victims with an autopsy performed, including negative or nonlethal drug findings, where cause of death was unknown or inconclusive (SADS).
    RESULTS: We identified 477 SADS victims; 313 (66%) had a positive toxicology screening result (adjudicated nonlethal), with an average of 2.8 drugs per case. More than half of the SADS victims with a positive toxicology screening result had QT-prolonging or brugadogenic drugs present. Polypharmacy was present in 66%, psychotropic polypharmacy in 37%, and QT-prolonging polypharmacy in 22%, with the most frequent overall and QT-prolonging drug combination being an antipsychotic and a psychoanaleptic drug. QT-prolonging drugs were more often present at suprapharmacologic levels than non-QT-prolonging drugs.
    CONCLUSIONS: The majority of the SADS population had a positive toxicology screening result, with a notably large proportion having proarrhythmic drugs and polypharmacy. This highlights the need for future focus on drugs as a risk factor for SADS.
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  • 文章类型: Journal Article
    基质金属蛋白酶-9(MMP-9)参与组织重塑和皮肤伤口愈合。本研究的重点是损伤后1h内表皮伤口愈合中MMP-9的表达,以测试MMP-9是否可用于估算法医实践中的损伤时间。分析由经历手术的5个个体组成的样品。经患者同意,以预定的时间间隔从手术伤口中取出皮肤切片。对于每个主题,共拍摄了8个部分,在0\'-1\'-3\'-5\'-10\'-15\'-30\'-60\'分钟定义的每个时间间隔。标本用MMP-9免疫染色,并检查阳性染色细胞数。阳性染色细胞的数量显示出随时间增加的趋势。在所有病例中3分钟内发现少于30个阳性染色细胞。在施加后5分钟的时间,在5例中的3例中,阳性染色细胞数超过30。在超过10分钟的所有情况下,MMP阳性细胞数超过40。根据这些结果,在法医环境中,MMP-9阳性细胞计数可能是1小时内伤口年龄估计的有用标志物.需要更多的研究来收集更多的样本,并将超急性期的样本与受伤后几天的样本进行比较。
    Matrix metalloproteinase-9 (MMP-9) is involved in tissue remodeling and in skin wound healing. The present study focuses on the MMP-9 expression in epidermal wound healing within 1 h after injury, to test whether MMP-9 can be used to estimate the time of injury in forensic practice.A sample consisting of 5 individuals undergoing surgery was analyzed. With the consent of the patients, sections of skin were removed from the surgical wound at predefined time intervals. For each subject, 8 sections were taken, one for each time interval defined at 0 \'- 1\' - 3 \'- 5\' - 10 \'- 15\' - 30 \'- 60\' minutes. The specimens were immunostained with MMP-9, and the number of positively stained cells was examined.The number of positively stained cells showed an increasing trend as a function of time. Less than 30 positively stained cells were found in all cases within 3 min. At the post-infliction time of 5 min, the number of positively stained cells exceeded 30 in 3 out of 5 cases. The number of MMP-positive cells exceeded 40 in all cases in over 10 min.In the light of these results, the count of MMP-9 positive cells might be a useful marker in the wound-age estimation within 1 h in forensic setting. More research is required to collect more samples and to compare samples from the hyperacute phase with those from several days after injury.
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  • 文章类型: Journal Article
    使用MisrakeGhion学院药学和护理专业学生的手长和手宽来预测身高,埃塞俄比亚东北部。
    一项横断面前瞻性研究于2021年10月15日至1月20日进行。该研究对316名学生(160名男性和156名女性)进行。研究参与者来自阿姆哈拉族,年龄范围为18至25岁。车身高度,手长,使用SPSS23版测量和分析手呼吸。使用相关分析评估关联强度。显著性水平设定为p<0.05。进行配对样本t检验。使用简单和多元线性回归分析得出回归方程。
    手长和手宽与男性和女性的身高均呈正相关。在男性和女性中,左手长度具有很强的显著相关性(男性r=0.768,女性r=0.670),其次是右手长(男性r=0.711,女性r=0.626)。关于手的长度,右手宽(男r=0.671,女r=0.438)和左手长(男r=0.504,女r=0.525)。左右两侧手长和手宽有显著差异(p<0.05)。为每个性别制定了简单和多元回归方程。
    在男性和女性中,可以使用简单或多元回归方程根据手的长度和宽度来估计身高。
    UNASSIGNED: To predict body height using hand length and hand breadth in pharmacy and nursing students at Misrake Ghion College, Northeast Ethiopia.
    UNASSIGNED: A cross-sectional prospective study was conducted from October 15 to January 20, 2021. The study was carried out on 316 students (160 males and 156 females). The study participants were from the Amhara ethnic groups, with the age range of 18 to 25 years. Body height, hand length, and hand breath were measured and analyzed using SPSS version 23. The strength of association was evaluated using correlation analysis. The significance level was set at p < 0.05. A paired sample t test was performed. Regression equations were derived using simple and multiple linear regression analysis.
    UNASSIGNED: Hand length and hand breadth had a positive significant correlation with body height in both male and females. In both males and females, left hand length had a strong significant correlation (males r = 0.768, females r = 0.670), followed by right hand length (males r = 0.711, females r = 0.626). Regarding hand length, right hand breadth (males r = 0.671, female r = 0.438) and left hand length (males r = 0.504, females r = 0.525). There was a significant bilateral difference in hand length and hand breadth on its right and left sides (p < 0.05). Simple and multiple regression equations were formulated for each sex.
    UNASSIGNED: In both males and females, body height can be estimated from hand length and breadth using simple or multiple regression equations.
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