pnet

Methods One patient with PNET of the pancreas was reported in this article .

方法分析我院胰腺PNET病例报道，阐述胰腺PNET的诊断和治疗。

Methods A case of PNET was observed by light microscopy , electric microscopy and immunohistochemistry .

方法：采用光镜、电镜和免疫组化对1例颈部原始性神经外胚层肿瘤（PNET）进行观察。

Methods Light microscopy and immunohistochemical stains were performed in 5 cases of thoracic PNET .

方法对5例发生于胸部的PNET进行光镜观察和免疫组化研究。

Objective To study the pathological characteristics of primitive neuroectodermal tumor ( PNET ) of bone and soft tissue .

目的探讨原始神经外胚层瘤（PNET）的病理学特点及其临床意义。

Adopted first-order second-moment method , advanced branch-and-bound method and PNET method are used to do reliability analysis for the structure system .

并用改进的一次二阶矩法、分枝限界法、PNET法对该结构系统进行结构可靠性分析。

However , abdominal radiography may lead to a higher incidence of primitive neuroectodermal tumor ( PNET ) .

然而，腹部放射却可能导致“原发性神经外胚层肿瘤”（PNET）发生率增高。

Based on the high accuracy formula and PNET method , the expressions of sensitivity analysis for truss structural system reliability are derived in this paper .

基于结构系统可靠性分析的高精度公式和PNET法，导出了桁架结构系统可靠度的敏度分析表达式。

Objective To evaluate the MRI features of intracranial primitive neuroectodermal tumors ( PNET ) in adults .

目的探讨成人颅内原始神经外胚层肿瘤（primitiveneuroectodermaltumors，PNET）的MRI特征，以期提高对该病的认识。

Results : ( 1 ) Osseous PNET originated from embryonic migrating cells of neural crest .

结果：（1）骨原始神经外胚层肿瘤来源于神经嵴的胚胎迁移细胞。

Conclusion PNET can occur in pancreas , and diagnosis and treatment should be made as early as possible to improve the outcome .

结论临床及病理科医师应了解胰腺PNET的存在，提高临床和病理诊断水平，早期积极治疗，以期改善预后。

Conclusion PNET is a high malignant tumor . The prognosis has improved in the modern era of treatment and genetics . Invasion ;

结论PNET是高度侵袭性肿瘤，随着遗传学和现代治疗学的进步，该肿瘤预后会逐步改善。

ABSTRACT : Objective To improve the diagnosis and treatment of primitive neuroectodermal tumors ( PNET ) of the pancreas .

摘要：目的提高对胰腺原始神经外胚叶肿瘤（PNET）诊断和治疗的认识。

S 100 was positive in EW / PNET , small cell osteosarcoma and mesenchymal chondrosarcoma .

7例EW/PNET瘤、1例骨肉瘤及3例间叶性软骨肉瘤均有S100阳性。

Finally trusswork reliability was calculated by PNET method . The process of trusswork reliability is opened out by the last examples .

使用PNET方法计算了结构的失效概率。最后举例说明了桁架结构随机可靠性分析的全过程。

Conclusions ( 1 ) PNET , EWS and Askin tumor belong to the same family .

结论：（1）PNET、EWS、Askin瘤属同一肿瘤家族。

PnET model is a useful tool to analyze forest growth , effect of different soil types and climate conditions on carbon , nitrogen and water flux of forest ecosystem .

PnET模型可用来分析森林林木生长规律，不同土壤类型及气候条件对森林生态系统碳氮通量变化的影响；

This thesis base on PNET , analyze the reliability on structural system and get the reliability index analyze the design variable and get the accurate expression , on sensitive analyze .

本文以PNET法为基础，分析结构系统可靠性，以及可靠性指标对设计变量敏度分析，给出敏度分析的精确表达式。

The theoretical basis of bridge reliability assessment is based on multiple failures mode , structure system reliability range method , PNET method , neural network method , genetic algorithms and so on .

桥梁可靠性评估的理论基础主要基于多重失效模式、结构体系可靠度界限范围法等。

It is suggested that the reliability index of each individual mechanism be calculated in generalized stochastic space , and then structural system reliability be calculated in terms of PNET .

采用在广义随机空间内计算各机构可靠指标，然后利用PNET法计算结构体系可靠度，计算简便，精度也满足要求。

Objective To investigate the value of dynamic contrast-enhanced MR imaging in the diagnosis and differentiation of primitive neuroectodermal tumor ( PNET ) in the thoracic spine .

目的初步探讨原始神经外胚层肿瘤（PNET）的动态增强MRI表现，以及对其诊断及鉴别诊断的价值。

Objective : To investigate the clinical and pathological characteristics , treatment and prognosis of peripheral primitive neuroectodermal tumor ( PNET ) of the urinary tract and reproductive system .

目的：探讨原发于泌尿生殖系统的原始神经外胚叶瘤的临床表现、病理特点、治疗方法及预后。

The tumors are often misdiagnosed as medulloblastoma , primitive neuroectodermal tumor ( PNET ), choroid plexus carcinoma or germ cell tumors .

肿瘤极易误诊为髓母细胞瘤、原始神经外胚叶肿瘤（PNET）、脉络丛乳头状癌及生殖细胞肿瘤。

Retroperitoneal PNET / EWS : one case report and review of the literature Ultrasonic Technology Assisted Microsurgery Resection of Ventral or Ventrolateral Spinal Schwannomas

腹膜后原始神经外胚层瘤/尤因肉瘤一例报告并文献复习超声乳化技术辅助显微手术切除脊髓腹侧及腹外侧神经鞘瘤

Methods MRI manifestations of 9 PNET diagnosed via operation and pathological examination were analyzed . There were 6 men and 3 women , and the mean age was 32.6 years .

方法分析经手术病理证实的9例原始神经外胚层肿瘤的MRI表现，其中男6例，女3例，平均年龄326岁。

The correlation coefficients of failure modes safety margins are calculated by linearization research of safety margin functions of the significant failure modes , and the reliability of structural system is evaluated by PNET method .

用改进的分枝限界法寻找主要失效模式，通过对主要失效模式方程的线性化研究，计算各主要失效模式安全余量之间的相关系数；然后用PNET法计算结构系统的可靠性指标。

Conclusions Immunohistochemical detection of FLI-1 is valuable in the diagnosis of EWS / PNET , and can be reliably applied to the differential diagnosis of small round cell tumors .

结论FLI-1在EWS/PNET诊断中的价值优于CD99，并且可用于小圆细胞肿瘤的鉴别诊断。

A GA and PNET based new algorithm for solving system reliabilities of complex engineerings . This method can use not only the merits of Probability Network Estimate Technology , but also the global searching ability of genetic algorithm ;

基于遗传算法（GA）和概率网络估算技术（PNET），提出了一种用于求解复杂系统结构可靠度的新型算法。

Conclusions Granulocytic sarcoma of the uterine cervix is rare . In routine histopathology , granulocytic sarcoma may be misdiagnosed as lymphoma , ES / PNET and small cell carcinoma .

结论宫颈粒细胞肉瘤是一种罕见肿瘤，仅凭形态学易误诊为淋巴瘤、ES/PNET、小细胞癌等。

The investigators concluded that in patients with medulloblastomas or PNET who had been treated with irradiation and high-dose radiation , WMLs are typically short-lived and do not cause symptoms .

研究者总结说：小脑幕上原始神经外胚瘤与成神经管细胞瘤的患者接受放疗和大剂量化疗后，脑白质损伤通常短期存在，并不产生症状。

Objective To study the clinicopathological features and diagnostic criteria of Ewing ′ s sarcoma / primitive neuroectodermal tumor ( Ewing ′ s sarcoma / PNET ) in oral and maxillofacial region .

目的提高对口腔颌面部Ewing肉瘤/原始神经外胚层瘤（Ewing肉瘤/PNET）的临床病理特征的认识，减少误诊。