Imaging features of central nervous system haemangiopericytomas

Intracranial and spinal haemangiopericytomas are uncommon, durally based tumours. They macroscopically resemble meningiomas but are distinct histologically, have a more aggressive natural history and require different management. We present a pictorial review illustrating the radiological manifestations of these tumours that will aid in their preoperative identification.     

心电图对急性心肌梗死相关血管的预计价值

对385例急性心肌梗死患者作选择性冠状动脉造影。心电图定位为前壁心梗的相关血管89%是左前降支动脉(LAD),下壁心梗的相关血管76.4%是右冠状动脉(RCA)。阻塞发生于 LAD、RCA及左迥旋支动脉(LCX)近端的分别占67%、58%与78%。近端病变90%以上为重度或完全阻塞。在下壁心梗早期心电图出现心前导联 ST 段下移,是病变广泛的一项指标。     

Purification of hemopoietic progenitor cells from human marrow using a fucose-binding lectin and cell sorting

Human peripheral blood granulocytes, but not lymphocytes, erythrocytes, or monocytes, bound the fucose-binding lectin from Lotus tetragonolobus (FBP), and this binding was competitively inhibited by the sugar alpha- L-fucose. The fluorescence-activated cell sorter was used to study the appearance of this receptor on human marrow cells during granulocyte differentiation and to prepare fractions enriched for granulocyte- macrophage progenitor cells (granulocyte-macrophage colony-forming cells--GM-CFC). Cell binding of fluoresceinated FBP increased for bone marrow cells in the sequence--lymphocytes, blast cells, promyelocytes and myelocytes, monocytes, and polymorphonuclear cells. Selection of cells with appropriate low-angle or high-angle light scatter characteristics achieved a 10-fold or 2-3-fold enrichment of progenitor cells, respectively. By selecting cells with intermediate fluorescence intensity, a further 2-3-fold enrichment for GM-CFC was obtained. Cell sorting using the optimal selection of these three parameters produced up to 36-fold enrichment of the progenitor cells from human bone marrow. The most enriched fraction was composed of 23% progenitor cells (colony- and cluster-forming cells) with a yield of 36%. In populations most highly enriched by GM-CFC, immature cells (blast cells, promyelocytes, and myelocytes) made up 95% of the cells present.     

Castleman病临床及病理类型与合并症关系分析:单中心大宗病例观察

目的 研究Cagtleman病(CD)的临床及病理类型与各种合并症的关系,推测各种合并症的发病机制,以提高对本病的认识.方法 回顾性分析北京大学第一医院自1977年以来共53例CD患者的临床特点,同时分析临床合并症与临床类型和病理类犁的关系.结果 53例CD患者中单中心型32例(60.4%),多中心型21例(39.6%);病理分型示透明血管型(HV)37例(69.8%),浆细胞型(PC)9例(17.0%),混合型(MIX)7例(13.2%).患者中32例有合并症,占60.4%.根据受累器官不同分为累及皮肤、内脏和血液系统.临床类型与某些合并症的发生密切相关,32例单中心型的主要合并症为副肿瘤性天疱疮(PNP)和闭塞性细支气管炎(BO),21例多中心型的主要合并症为肾脏、血液改变.病理类型与合并症的发生密切相关:透明血管型主要合并症为PNP和BO,浆细胞型和混合细胞型主要合并症为内脏和血液受累.合并PNP的CD患者的临床和病理分型均不同于其他CD.Kaplan-Meier分析显示:伴有合并症的患者生存率明显低于无合并症的患者(P=0.028).结论 CD患者的合并症与其临床、病理分型有关,合并PNP的CD患者应单独分型,有无合并症是影响CD患者预后的关键因素.     

多层螺旋CT诊断乙肝后肝硬化的运用与临床价值分析

目的 分析多层螺旋CT在乙肝后肝硬化诊断中的运用与临床价值.方法 选取2018年2月至2019年6月于本院诊治的43例乙肝后肝硬化患者为研究对象(观察组),选取同期43例无肝脏病变或病史的健康志愿者为对照组.两组均采用多层螺旋CT检查,计算肝脏体积,分析肝脏血供情况,观察其诊断准确性.结果 观察组患者的平均肝脏体积显著...     

Childhood tumors of the brain: demographic pattern over a ten-year period in the Kashmir Valley

Brain tumors in children represent the second most frequent tumors in this age group after hematologic malignancies. We highlight the demographic pattern after retrospective analysis of brain tumors in children from geographically and ethnically distinct Kashmir Valley managed in our center between 2000 and 2009. We had a total of 248 pediatric patients with brain tumors. The parameters analyzed were age, gender, location of tumors and histopathological subtypes as well as WHO grade of tumor. We also did a comparison between the frequencies of common varieties of tumor in the first and second 5-year periods. We found that 111 tumors (44.75%) were supratentorial, and 137 (55.25%) were infratentorial. The male-to-female ratio was 1.4:1. The proportions of low-grade and high-grade tumors were 60 and 40%, respectively. The most common tumor in our series was astrocytoma. The most common tumors in the supratentorial and infratentorial compartments were craniopharyngioma and medulloblastoma, respectively. Our experience reflects a different demographic profile of pediatric brain tumors as compared with other regions of the world.     

Infective endocarditis due to Salmonella typhi--a case report

Endocarditis is a rare complication of typhoid fever. We report a case in which Salmonella enterica serotype typhi was isolated from a case of endocarditis. The isolate was resistant to ampicillin, chloramphenicol and ciprofloxacin but sensitive to ceftriaxone, amikacin and gentamicin.     

Ocular toxocariasis in a child: a case report from Kashmir, north India

Toxocariasis is an important zoonotic disease caused by the second stage larva of Toxocara canis or Toxocara cati . The typical clinical syndromes of toxocariasis in humans are visceral and ocular toxocariasis. Ocular toxocariasis may presents as peripheral inflammatory mass, posterior pole granuloma and endophthalmitis. We report a serologically confirmed case of ocular toxocariasis in 12-year-old female. The diagnosis was confirmed by detection of anti- Toxocara antibodies in aqueous and vitreous sample by enzyme-linked immunosorbent assay. We suggest that ophthalmologist in this region should include ocular toxocariasis in differential diagnosis particularly in children and young adults.     

人肠道病毒71型感染免疫抑制恒河猴的分析

目的: 通过建立人肠道病毒71型(EV71)感染在免疫抑制恒河猴的动物模型,进一步分析人EV71在免疫抑制动物体内病毒增殖、病理变化以及病毒抗原在不同组织的表达情况。方法: 按照每天15 mg/kg的剂量给8只恒河猴口服环孢菌素A连续7 d后造成其免疫抑制状态,再经呼吸道和消化道感染EV71病毒FY23株,对其进行14 d的临床观察后处死,采集各器官组织进行病毒载量检测,同时对不同的组织进行病理学分析和免疫组化分析。结果: 感染EV71病毒后,免疫抑制组的临床症状、病毒载量、病理分析和免疫组化结果都明显比非免疫抑制组严重,从病毒对机体造成的影响来看呼吸系统感染较消化系统感染明显严重。结论: 本实验分析了人EV71在免疫抑制动物体内病毒增殖的情况,为建立用于EV71疫苗评价的恒河猴动物模型提供了依据,并对未来的EV71疫苗的使用人群范围做出了新的限定。