Bilateral First Rib Anomalous Articulations with Pseudarthroses Mimicking Healing Fractures in an Infant with Abusive Head Injury

Bilateral symmetric bone nodules were observed in the anterolateral first ribs of an infant with shaking injuries at autopsy. The location prompted diagnostic considerations of healing fractures versus anomalous articulations with pseudarthroses. The forensic pathologist worked with forensic anthropologists and pediatric radiologists to evaluate autopsy findings and compare premortem and postmortem X‐rays. Gross examination of the bones by the pathologist and anthropologists confirmed bilateral, callus‐like bone nodules in first‐rib locations associated with pseudarthroses. Histologic examination of one of the bones further showed features most consistent with pseudarthrosis, not a healing fracture. Radiologists then compared multiple premortem and postmortem radiographs that showed no remodeling of the bone over a 2‐week interval between the time of injury and death, which would be unexpected for a healing fracture in an infant. This multidisciplinary approach resulted in the appropriate diagnosis of pseudarthroses due to anomalous articulations, an uncommon finding in forensic pathology.     

Quantitative Assessment of the Sternal Rib End Morphology and Implications for Its Application in Aging Human Remains

Intercostal and age differences in the sternal rib end morphology of documented female skeletons from Spitalfields and St. Bride's are examined. The morphology was captured using three‐dimensional morphometrics and the statistical analyses employed included parametric and nonparametric MANOVA, discriminant analysis, and multilinear regressions. It was found that the quantified morphology of the sternal rib end was statistically significantly different between rib four and all other ribs except for the third one and that the morphological characteristics of all ribs varied with age. However, due to the inherent variability in sternal rib end morphology, nonstatistically significant results were obtained among the various age groups and neither disciminant nor multilinear regression analysis could be used for the estimation of the age of an individual based on digitized coordinates of the sternal rib end of individuals of known age, raising some concern as to the rigorousness of the fourth rib aging method.     

螺旋CT三维成像技术在疑难骨外伤中的应用价值

目的探讨螺旋CT(SCT)三维(3D)成像技术在法医疑难骨外伤中的诊断价值。方法选择11例骨外伤病人进行X线及螺旋CT3D检查,观察和分析骨折的位置、数量及性质。结果11例中,X线检查共发现肋骨骨折34处,肩胛骨骨折1处,鼻骨骨折2处,掌骨不完全性骨折1处,左胫、腓骨骨折1处,耻骨骨折1处。CT检查共发现肋骨骨折47处,肩胛骨粉碎性骨折1处,鼻骨骨折明显移位1处,排除骨折1处,上颌骨骨折1处,掌骨完全性骨折1处,左胫、腓骨陈旧性骨折1处,骶骼关节脱位1处,第5腰椎椎弓根骨折1处。结合三维图像,冠位状及矢位状重组图像清晰地显示出骨折线的部位、数量、性质和错位、复原等情况。结论螺旋CT三维成像应用对法医复杂骨外伤的客观诊断非常有效,优于常规X线检查。     

从断裂到整合:对乡村振兴的政治社会学考察——基于冀西北地区X村的个案研究

在政治社会学的理论视域内,新时代实施乡村振兴战略的关键在于寻求国家与乡村社会的均衡互动。参照社会整合的分析框架以及X村的调研材料可以发现,在现代化的驱动下,历经深层次的社会改造和全方位的市场洗礼之后,当前的乡村社会同时出现了由传统宗族萎缩和村级组织涣散诱发的组织断裂问题、由伦理原则变迁和公共文化式微诱发的文化断裂问题以及由乡绅消亡和精英虚化诱发的精英断裂问题。面对缺乏有机统一性的断裂社会,落实乡村振兴战略必须从有效重整村庄社会入手,依循重建组织资源、复兴公共文化、强化精英供给的实践路径,筑牢与国家正向互动的社会基础,从而使国家与乡村社会的关系达成新的平衡。     

基于深度学习的人体肋骨骨折智能检测技术

目的将人工智能中的深度学习技术应用到人体肋骨骨折识别,实现人体肋骨骨折智能检测,提高法医肋骨骨折诊断效率。方法采集3143例人体胸部X线数字影像(2602例用于训练,541例用于测试),标注肋骨骨折特征点,通过多层网络堆叠,分层、分级主动学习原始数据高度抽象的特征表述,并将此特征反馈至检测器进行骨折检测,输出骨折位置及相应置信度。结果基于深度学习的人体肋骨骨折检测准确率在90%以上。结论基于深度学习的人体肋骨骨折检测准确率较高,可用于辅助法医进行肋骨骨折识别诊断、检验鉴定等,本研究可为人体其他部位骨骼损伤智能检测提供参考。     

65例道路交通事故死亡案例骨盆骨折特征的法医学分析

目的分析道路交通事故死亡案例中骨盆骨折的特点及成伤机制。方法收集65例发生骨盆骨折的道路交通事故死亡案例,对骨盆骨折的部位、特点、成伤机制等情况进行统计学分析。结果 65例骨盆骨折案例中,骶髂关节脱位38例,且多合并耻骨联合分离或耻骨骨折;耻骨、坐骨、髋臼骨折主要以线性骨折为主,骶尾骨骨折以粉碎性骨折多见;合并盆腔软组织损伤54例,盆腔器官损伤8例,腹腔器官损伤44例。骨盆环损伤类型中,分离型32例,占49.23%;其次是压缩型,占26.15%;垂直型最少,仅1例,占1.54%。结论细致、全面地检验尸体,确定骨盆骨折类型,有助于分析成伤机制。     

An Assessment of the Skeletal Fracture Patterns Resulting from Fatal High (˃3 m) Free Falls

The injury patterns resulting from fatal high (?3 m) free falls have previously been documented in clinical and medico‐legal contexts; however, details relating specifically to the skeletal blunt force trauma (BFT) have been limited. This study aimed to augment what is known of the skeletal fracture patterns resulting from fatal high free falls. Skeletal trauma was analyzed from full‐body postmortem computed tomography scans of 95 individuals who died following a high free fall. Fracture patterns were documented using the five general anatomical regions, axial and appendicular regions, and postcranial unilateral and bilateral regions. Patterns were analyzed in the context of the extrinsic and intrinsic variables that may influence fractures using multiple logistic regression. Fracture patterns involved all aspects of the skeleton, with 98.9% exhibiting polytrauma, and were influenced primarily by the height fallen, manner of death, and landing surface. This improved understanding of fracture patterns will augment anthropological interpretations of the mechanism of BFT in cases of suspected high falls.     

骨折经过时间推断的研究现状与展望

Gong Wei;Wang Yantao(The PublicSecurity Bureau of Shiyan,Shiyan,Hubei,442000)     

Healing following cranial trauma

This paper reports on the gross appearance of the initial osseous response following cranial gunshot wounds. A total of 127 adult crania and cranial sections were analyzed for four types of bone response: osteoblastic, osteoclastic, line of demarcation, and sequestration. In general, no osteoblastic or osteoclastic response was noted during the first week. This response was followed by an increasing prevalence of expression after this time. By the sixth week postfracture both osteoclastic and osteoblastic activity was scored for 100% of the sample. Further, our observations suggest that the line of demarcation may establish the boundary between the living bone and bone not surviving the fracture. Sequestration appears to be a long-term event and was scored as present well past the eighth week of healing. The osseous expression of infection following fracture was also considered.