Osteolipoma of the buccal mucosa: a case report

Lipomas are benign mesenchymal neoplasms of soft tissue that can be found commonly in any part of the human body. Their presence in the oral mucosa is uncommon, however, with approximately 4% of the cases occurring in the oral cavity. Oral lipomas are likely to have originated from mature adipose tissue and there are several histological variants of lipomas described, which are identified according to the predominant type of tissue in addition to adipose tissue. A rare lipoma variant, known as an osteolipoma or an ossifying lipoma, may occur; however, little has been written this type of lipoma characterized by a classical lipoma with areas of osseous metaplasia. This paper describes a case of an osteolipoma involving the buccal mucosa of an adult patient.     

应用胱抑素C早期诊断造影剂肾病的价值

目的探讨胱抑素C在早期诊断造影剂肾病中的应用价值。方法选取本院经皮冠状动脉介入治疗术(PCI)及冠状动脉造影术的患者96例,根据造影后48 h内是否发生造影剂肾病(CIN)分为观察组和对照组。比较2组患者造影剂用量、术后输液量及造影前后相关指标水平。结果观察组造影剂用量显著高于对照组(P0.05);观察组造影后Cys-C水平显著高同组造影前及同期对照组(P0.05);观察组造影后2 d的Scr水平显著高于同组造影前及同期对照组(P0.05);以Cys-C水平升高超过基线水平的25%为诊断标准,造影后CIN发生率为16.7%,高于以Scr水平为诊断标准的4.2%,差异有统计学意义(P0.05)。结论 Cys-C能很好地反映肾功能变化情况,可用于造影剂肾病的早期诊断。     

Reticulocytes. I. Isolation and in vitro maturation of synchronized populations

Studies of reticulocyte maturation have been limited by the inability to obtain pure populations of age-synchronized reticulocytes and by the absence of well-defined methods for the maturation of reticulocytes in vitro. Many of these problems were overcome using temporary suppression of erythropoiesis with thiamphenicol and phlebotomy resulting in a highly reproducible reticulocyte response, Percoll density gradient separation of cells yielding essentially pure populations of age- synchronized reticulocytes, and liquid culture techniques where cell lysis is minimal. The system allows reproducible study of well-defined cohorts of reticulocytes as they mature into erythrocytes. During in vitro maturation we serially monitored changes in reticulocyte count, glucose consumption, 125I-transferrin binding, fluorescein (FITC)- labeled transferrin binding, the activities of four erythrocyte enzymes (glucose-6-phosphate dehydrogenase, pyruvate kinase, phosphofructokinase, and lactate dehydrogenase) and the appearance of cells on scanning electron microscopy. These variables changed at different rates suggesting that multiple mechanisms underlie these maturational events. Transferrin binding and reticulocyte count decreased most rapidly and reached values near zero after three to four days in culture. The four enzyme activities decreased much more slowly, and only two reached pretreatment values after seven days in culture. In contrast to the findings of others, scanning electron microscopy suggested that cells do not assume the normal biconcave shape in this system. The methods described make it feasible to study the process of reticulocyte maturation in vitro. The data presented represent a first step in the study of the coordination and interrelationships of various maturational processes.     

基于深度学习的肺结节检测算法对不同大小肺结节的检出效果

目的 探讨基于深度学习（DL）的肺结节检测算法对不同大小肺结节的检出效果。方法 回顾性分析344例肺结节患者的胸部CT图片,计算并比较基于DL的肺结节检出模型对不同大小肺结节的检出率（相对于医师诊断结果）,分析模型检出假阳性结节的类别。结果 344份CT图像中,医师共诊断710个0~30 mm肺结节。模型共检出2 495个候选肺结节,其中真阳性675个（相对于医师诊断结果）,模型对结节的检出率为95.07%（675/710）。模型对0~4 mm肺结节的检出率为82.80%（77/93）,0~5 mm结节为90.15%（238/264）,0~6 mm结节为92.94%（395/425）,5~10 mm结节为97.94%（381/389）,10~20 mm结节为98.21%（55/56）,20~30 mm结节为100%（1/1）,模型对不同大小肺结节的检出率差异无统计学意义（χ²=21.72,P>0.05）。模型检出假阳性结节中,50.38%（917/1 820）为医师最初诊断漏诊者,32.53%（592/1 820）为血管断面。结论 DL肺结节检出模型对肺结节的整体检出率较高（95.07%）,且不受结节大小的影响。     

锝-亚甲基二膦酸盐联合甲氨蝶呤治疗类风湿关节炎的效果分析

目的 探讨锝-亚甲基二膦酸盐联合甲氨蝶呤治疗类风湿关节炎（RA）的效果。方法 采用回顾性、便利抽样研究方法,2016年1月-2018年3月选择在攀枝花市中心医院诊治的RA患者128例作为研究对象,根据治疗方法的不同分为观察组与对照组各64例,对照组给予甲氨蝶呤治疗,观察组给予锝-亚甲基二膦酸盐联合甲氨蝶呤治疗,两组都治疗观察3个月,比较两组的临床疗效,记录两组在治疗期间出现的消化道症状、口腔溃疡、失眠、肝肾功能异常等不良反应情况,记录两组治疗后的关节肿胀数、关节压痛数,比较两组治疗前后的白介素-6（IL-6）及肿瘤坏死因子-α（TNF-α）水平。结果 所有患者都顺利完成治疗,观察组与对照组的治疗总有效率分别为100.0%和89.1%,观察组高于对照组,差异有统计学意义（P<0.05）。观察组与对照组治疗期间的消化道症状、口腔溃疡、失眠、肝肾功能异常等不良反应发生率分别为14.1%和12.5%,两组对比差异无统计学意义。观察组治疗后的关节肿胀数、关节压痛数显著少于对照组,差异有统计学意义（P<0.05）。治疗后两组血清IL-6、TNF-α水平显著低于治疗前,同组治疗前后比较差异有统计学意义（P<0.05）,观察组也低于对照组,差异有统计学意义（P<0.05）。结论 锝-亚甲基二膦酸盐联合甲氨蝶呤治疗RA能抑制炎症因子的释放,能改善患者的关节功能障碍,提高治疗疗效,且不会增加不良反应的发生,有很好的应用价值。     

Use of Non-Cryopreserved Peripheral Blood Stem Cells Is Associated with Adequate Engraftment in Patients with Multiple Myeloma Undergoing an Autologous Transplant

Autologous transplantation is the standard of care for transplant-eligible patients with multiple myeloma. Toward making this treatment accessible in developing countries, there are significant challenges like resource constraints and access to cryopreservation facilities. We performed a retrospective analysis of patients with multiple myeloma who underwent autologous transplantation using granulocyte colony-stimulating factor (G-CSF)-mobilized non-cryopreserved grafts at our institution from January 1995 to December 2014. Peripheral blood stem cells (PBSCs) were harvested over 1 to 2 days after G-CSF mobilization. After apheresis, PBSCs were stored at 4°C in a blood bank refrigerator for up to 72 hours. During the study period, 224 patients with multiple myeloma underwent autologous transplantation using G-CSF–mobilized non-cryopreserved grafts. The number of days of stem cell harvest was 1 in 91 patients (40.6%) and 2 in 133 patients (59.4%). The median CD34 cell dose was 4.87?×?10⁶/kg (range, 1.15 to 23.7). All patients except 1 engrafted. The median time to neutrophil engraftment was 12 days (range, 9 to 22). The median time to platelet engraftment was 17 days (range, 10 to 44). In a resource-limited setting, the use of G-CSF–mobilized non-cryopreserved grafts results in adequate engraftment for most patients with multiple myeloma undergoing autologous stem cell transplantation.     

Graft failure after T-cell-depleted human leukocyte antigen identical marrow transplants for leukemia: II. In vitro analyses of host effector mechanisms

To identify mechanisms potentially contributing to graft failure, 19 leukemic recipients of T-cell-depleted marrow transplants who failed to engraft following a transplant of HLA identical sibling marrow depleted of T cells by soybean agglutinin (SBA) and sheep erythrocytes (E) were evaluated. Peripheral blood mononuclear cells isolated at the time of failure were consistently of host origin, bearing the phenotype of suppressor T cells (CD3+, CD8+, Leu 7+). A direct cytolytic effect on 51Cr-labeled donor-derived target cells was not detected, a finding that contrasts with the donor-specific cytotoxic host T lymphocytes that have been regularly observed in patients rejecting HLA nonidentical SBA -E- BMTs. However, these host T cells did exhibit a strong and specific suppressive activity against the donor marrow CFU- GM in vitro. Furthermore, in contrast to prior findings in durably engrafted recipients of SBA -E- BMTs, the lymphocytes isolated prior to or at the time of graft failure lacked natural killer surface antigen expression and effector function.     

窦房结脂肪垫对犬右上肺静脉电生理特性影响的研究

目的研究不同水平刺激窦房结脂肪垫(SANFP)对右房(RA)及右上肺静脉(RSPV)的有效不应期(ERP)及心房颤动(简称房颤)诱发率的影响,探讨SANFP对房颤发生维持的作用。方法6只犬麻醉后经右侧开胸暴露RSPV及SANFP,以0.6～2,5,8mV三种不同电压强度水平、60ms频率刺激SANFP,同时以S1S2刺激观察三种水平下RA游离壁远、中、近端及RSPV远、中、近端ERP的变化;同样方法刺激SANFP以S1S1和S1S2程序刺激诱发房颤,测定房颤的诱发率。结果以5mV电压刺激窦房结脂肪垫RSPV近端ERP较基础时明显缩短(90±24msvs109±16ms,P<0.05),其房颤诱发率50%;以5,8mV电压刺激SANFP时RA游离壁近端、中端ERP变化较基础时明显缩短(96±20msvs117±14ms,65±20msvs117±14ms,P均<0.05),其房颤诱发率100%。结论窦房结脂肪垫可能在肺静脉起源的房颤的诱发和维持中起了重要作用。