鼻部源性突眼的CT分析

目的：为了提高对鼻部源性突眼的认识。材料和方法：本文19例鼻部源性突眼，其中鼻咽癌7例，鼻咽纤维血管瘤2例，鼻腔纤维血管瘤、恶性肉芽肿和嗅神经母细胞瘤各1例，上颌窦癌和软骨肉瘤各2例，上颌窦恶性肉芽肿、纤维肉瘤和恶性纤维组织细胞瘤各1例，全部病例均作轴位CT扫描，12例加作增强扫描，详细分析了它们CT表现。结果：源于鼻咽的放疗前鼻咽癌和纤维血管瘤，其病变主要位于鼻咽腔和咽旁，后者显著增强并有钙斑，与前者不同；源于上颌窦的肿瘤，病变占据上颌窦的全部或大部分，软骨肉瘤有钙斑且无强化，易与其它肿瘤区别，它们破坏上颌窦顶部进入眼眶；鼻腔嗅神经母细胞瘤在鼻腔和筛窦形成肿块，破坏筛骨眶板侵入眼眶。结论：根据CT所见，可判断突眼原因。     

Localized proton magnetic resonance spectroscopy of a cerebellar tumor in a two-year-old child

Noninvasive localized proton magnetic resonance spectroscopy (MRS) was used for differential diagnosis of a focal brain lesion in a 2.5-year-old girl. The clinical signs were a mild head tilt and neck pain. Magnetic resonance imaging (MRI) revealed a lesion in the right hemisphere of the cerebellum, but its nature remained obscure. In this lesion quantitative determinations of cerebral metabolites by fully relaxed, short-echo-time proton MRS revealed markedly lowered N-acetylaspartate (NAA) and pronounced elevations of choline-containing compounds (Cho) and myo-inositol (Ins), whereas metabolite concentrations in cortical gray matter and white matter were within normal ranges. The metabolite pattern of the lesion indicated loss of vital neuroaxonal tissue (low NAA) and enhanced glial proliferation (high Cho and Ins), which, together with the MRI morphology, suggested a brain tumor. The diagnosis was established by neurosurgical exploration and total extirpation of the tumor. Histology confirmed an astrocytoma (WHO II). After 2 weeks' recovery the child was discharged with no neurological signs.     

健血升白冲剂对小鼠造血功能的影响

目的：研究健血升白冲剂对小鼠血液系统的影响。方法：以骨髓细胞计数，白细胞计数和血象为指标，观察健血升白冲剂对正常小鼠和化学及放射损伤小鼠的影响。结果：健血升白冲剂明显增加正常小鼠白细胞计数（Ｐ＜００１），显著改善环磷酰胺诱导小鼠白细胞和骨髓细胞的减少作用（分别为Ｐ＜００５，Ｐ＜００１），并能显著增加６０Ｃｏ放射损伤小鼠骨髓细胞（Ｐ＜００１）和白细胞（Ｐ＜００１）。结论：健血升白冲剂对化学及放射损伤小鼠血液系统有明显的保护及改善作用。是一个有开发价值的药物。     

儿童原发性腹膜后恶性肿瘤的诊断与治疗

分析原发性腹膜后恶性肿瘤１２例。８３％以腹块和腹痛为主要症状，体征中腹块占９１．５％，以恶性淋巴瘤居首位占６１％。全组完全切除率为５８％，行脏器联合切除占２５％。完全切除加放疗、化疗３年存活率为２８．５％，部分切除及活检未给其它治疗者５例预后差，均１年内死亡，差别显著。     

Monolayer cultures of normal human bone cells contain multiple subpopulations of alkaline phosphatase positive cells

Summary Cytochemical staining of normal human bone cells in monolayer cultures for alkaline phosphatase (ALP) indicated that the cultures contained mixed-cell populations. Time course evaluations of the cytochemical staining revealed, in addition to the ALP-negative cell population, at least two subpopulations of ALP-positive human bone cells with different levels of ALP. A cytochemical method has been developed which separates the ALP-positive cells into high and intermediate ALP subpopulations. In this method, human bone cells were stained for ALP using an azo-dye method and incubating at 4°C for 10 and 30 minutes, respectively. We defined the cell population that stained positively for ALP at 10 minutes as strong ALP-positive cells, and both strong and intermediate cells were stained at 30 minutes. The intermediate cells were determined from the difference between the values at the two time points. The intra- and interassay variations of the assay, with the same investigator in blinded investigations, were both less than 10% and the interobserver variation was approximately 25%. Analysis of the distribution of ALP levels in cells with a laser densitometer confirmed the presence of at least three cell subpopulations. 1,25(OH)₂D₃ treatment increased the proportions of both ALP-positive cell populations, whereas TGF-beta treatment increased only the intermediate ALP-positive cell population. On the contrary, fluoride increased the proportion of the strong ALP cells, and IGF-1 had no effect on the proportions of either ALP-positive subpopulation. When the ALP-specific activity was compared with the percentage of each ALP-positive subpopulations for the cells treated with effectors, the ALP-specific activity correlated with the total ALP-positive and with the strong ALP-positive populations but not with the intermediate ALP-positive subpopulation. In summary, this study represents the first evidence that normal human bone cells in monolayer cultures contained at least two subpopulations of ALP-positive cells, and that bone cell effectors could have differential effects on each cell population.     

Papilliferous keratoameloblastoma

A case of papilliferous keratoameloblastoma is reported which is only the second ever documented. The patient was a 76-yr-old black woman with a large expansile multilocular radiolucency of the body, angle and ramus of the mandible. Histologically the lesion consisted of sheets of cystic follicles filled with necrotic debris and sometimes parakeratin. The vast majority of the follicles were lined by a papilliferous epithelium consisting of large rounded cells with centrally placed nuclei. True papillary projections with cores of connective tissue were also present. The remainder of the follicles were lined by a thin parakeratinising stratified squamous epithelium. Histological features characteristic of ameloblastoma were absent. Final classification of these lesions will have to await the reporting of further cases.     

183例老年人骨密度检测分析

目的 :研究老年人不同疾病时骨密度 (BMD)的分布情况。方法 :用DXADAS 6 0 0EX型骨密度仪对183例老年患者进行左侧远程桡骨加尺骨BMD检测。结果 :内分泌疾病组、消化道疾病组和其它疾病组的患病率分别为 72 7% ,2 0 6 %和 31 4 %。T值比较 :三组差异明显 (P <0 0 0 1)。累积骨丢失率 (ABLR)比较 :前一组明显高于后两组病人 (P <0 0 1)。BMD比较中 ,内分泌和其它疾病组明显低于消化道疾病组 (P <0 0 0 1)。相关分析显示 ,内分泌和消化道疾病组的年龄变化与BMD呈正相关 (r =0 5 19P <0 0 0 1和r =0 5 89P <0 0 0 1) ,内分泌疾病组和其它疾病组的体重变化与BMD呈正相关 (r=0 918P <0 0 0 1和r =0 338P <0 0 0 1)。结论 :老年人骨质疏松 (OP)患病率以内分泌疾病组最高 ,消化道疾病组较低 ;随年龄和体重增加 ,BMD降低加重。     

肝细胞癌的相关血清标志物

HCC的早期诊断是其治疗的关键，HCC血清标志物的检测又为其诊断提供了有利的途径，并且操作简单，敏感性高和特异性强。目前常用的血清标志物为AFP、AFP变异体、AFP mRNA、AFU、GGT、DCP、AIF、GPC3等。这些标志物的联合使用有助于HCC的诊断及预后。     

骨外型牙源性钙化上皮瘤1例报告

牙源性钙化上皮瘤是一种良性肿瘤，也称Pindborg瘤，可分为骨内型和骨外型2种，主要发生于颌骨内，偶见于颌骨外。本文报告1例发生于口底的牙源性钙化上皮瘤，其临床症状与口底皮样囊肿相似．术后经组织病理学确诊，主要组织病理学特征是嗜酸性环状钙化团块。因其具有局部侵袭性，为避免复发，提倡完整切除肿物。