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71.
朱才松 《中国临床医学影像杂志》1998,(2)
目的:总结子宫肌瘤的CT特证,讨论其应用价值。材料与方法:分析38例经手术病理证实为子宫肌瘤的CT征象,对横断面上显示病变大小、位置与宫腔关系及病变的强化进行评价。结果:38例中除1例误诊为子宫内膜癌外,CT都确诊为子宫肌瘤,其CT诊断准确率为973%。其中浆膜下型10例,壁间型18例,粘膜下型2例,混合型8例。全部病例子宫均有不同程度增大;肌瘤表现为低密度或等密度的实质性肿块,边界清楚。较大的肌瘤可有低密度坏死灶。钙化灶3例,占79%。增强扫描肌瘤与正常肌层相差5~10HU。结论:CT在显示子宫肌瘤的大小、位置与宫腔关系上有较高的诊断价值,可作为B超检查的重要补充手段 相似文献
72.
Acquired immunodeficiency syndrome-associated non-Hodgkin's lymphomas and other malignancies in patients with hemophilia 总被引:3,自引:0,他引:3
Ragni MV; Belle SH; Jaffe RA; Duerstein SL; Bass DC; McMillan CW; Lovrien EW; Aledort LM; Kisker CT; Stabler SP 《Blood》1993,81(7):1889-1897
Non-Hodgkin's lymphoma (NHL) is the most common human immunodeficiency virus (HIV)-associated malignancy in hemophiliacs. We studied the incidence and clinicopathologic features of NHL in 3,041 hemophiliacs followed at 18 US Hemophilia Centers between 1978 and 1989. Of the 1,295 (56.6%) who were HIV(+), 253 (19.5%) developed acquired immunodeficiency syndrome (AIDS), of whom 14 (5.5%) developed NHL. Three NHL occurred in HIV(-) hemophiliacs, for a 36.5-fold greater risk in HIV(+) than HIV(-) hemophiliacs (P < .001). The NHL incidence rate was 29-fold greater than in the US population by Surveillance, Epidemiology, and End Results (SEER) estimates (P < .001). Between 0 and 4 lymphomas have been observed per year between 1978 and 1989. At presentation 13 (92.9%) of the HIV(+) NHL were extranodal. Ten were stage IV, 1 stage II, and 3 stage IE. Ten (71.4%) were high-grade, 3 (21.4%) intermediate-grade, and 1 (7.1%) was a low-grade B-cell lymphoma. Epstein-Barr virus (EBV) DNA was detected in 36% by in situ hybridization, including one central nervous system (CNS) lymphoma. The mean CD4 cell count at NHL diagnosis was 64/mm3, the mean latency from initial HIV infection was estimated to be 59 months, and the median survival was 7 months. The incidence of basal cell carcinoma in HIV(+) hemophiliacs was 18.3-fold greater than in HIV(-) hemophiliacs (P < .001) and 11.4-fold greater than in the US population (P < .001). In conclusion, incidence rates of NHL and basal cell carcinoma in HIV(+) hemophiliacs are significantly increased over rates in HIV(-) hemophiliacs and over rates in the US population. Clinicopathologic presentation of NHL in HIV(+) hemophiliacs is similar to that in HIV(+) homosexual men. 相似文献
73.
This article presents an overview of the work of the New Brunswick Health Council (NBHC) since its creation by exploring its mandate and by presenting its different initiatives and publications as they relate to the NBHC's areas of work: population health, care experience, sustainability, and citizen engagement. 相似文献
74.
Diffuse large cell lymphoma in a patient with hairy cell leukemia: immunoglobulin gene analysis reveals separate clonal origins 总被引:1,自引:0,他引:1
A 75-year-old man with hairy cell leukemia (HCL) was found to have an immunoblastic lymphoma of the small bowel. Immunologic and genotypic characterization of these neoplasms revealed both the HCL and the immunoblastic lymphoma to be of the B cell lineage. The HCL expressed the HCL-associated antigens detected by the monoclonal antibodies HC-1 and HC-2, whereas the immunoblastic lymphoma failed to react with these antibodies. In addition, surface immunoglobulin light chains could not be accurately determined for the hairy cells, whereas the immunoblastic lymphoma was shown to express only kappa immunoglobulin light chains. These immunophenotype differences were compatible with either the clonal evolution of the HCL into the immunoblastic lymphoma or a separate clonal origin for these two neoplasms. An analysis of tumor DNA by Southern blot hybridization revealed different heavy-chain and kappa light-chain gene rearrangements in these two malignancies. Thus the occurrence of the large cell lymphoma most likely represents the emergence of a second clonally unrelated B cell malignancy. 相似文献
75.
76.
77.
目的 :评价螺旋CT中内插方式、螺距以及重建间隔对噪声的影响。方法 :采用SomatomPlus 4螺旋CT机。在相同条件下扫描直径为 2 0cm的水模 ,测得水模图像中心 40cm2 兴趣区的CT值标准差作为评价噪声水平的指标。结果 :3 60°线性内插的噪声减少 (t =3 4.87,P <0 .0 0 1) ,180°线性内插的噪声增加 (t =18.78,P <0 .0 0 1)。螺距大于 1.0或小于 1.0与螺距为 1.0时噪声水平的差异无显著性意义 (P >0 .0 5 )。随着重建间隔改变 ,相应噪声水平的差异无显著性意义 (P >0 .0 5 )。结论 :与常规扫描相比 ,螺旋CT内插方式对噪声有一定影响 ,而螺距与重建间隔对噪声水平影响不明显。 相似文献
78.
胰腺癌可切除性的CT研究 总被引:2,自引:0,他引:2
43例胰腺癌均经手术和/或病理证实,其中10例经胰十二指肠切除术切除。本文复习CT所见,初步认为下列表现是胰腺癌不可切除的CT征象:(1)胰头癌距肝门的距离少于4cm;(2)肠系膜上动脉、下腔静脉、腹主动脉、胃、肝、脾、左肾及较大范围的肠系膜上静脉浸润;(3)肝转移。腹水、肠系膜上动脉周围脂层的单纯消失均不是判断不可切除的可靠征象。 相似文献
79.
目的:探讨螺旋CT在外伤性脑梗死诊断中的价值及其特征。方法:对39例头颈部外伤后临床主要表现为不同程度的偏瘫患者行横断面螺旋CT扫描,分析外伤性脑梗死的CT表现。结果:根据临床和CT表现分为两型:I型(21例),外伤性腔隙性脑梗死,好发于基底节-内囊区,均位于豆状核、尾状核及内囊区,呈小片状腔隙性低密度区;Ⅱ型(18例),外伤性大面积脑梗死,为脑叶梗死呈扇形低密度区,与大脑前中后供血动脉或颈内动脉分布一致,范围较大。结论:螺旋CT扫描检查对外伤性脑梗死的准确诊断、估计病变程度,分析两型脑梗死的不同发生机制,为临床诊断、治疗及判断预后提供重要信息。 相似文献
80.