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1.
周围型肺腺癌的CT分析 总被引:12,自引:3,他引:9
目的 研究周围型腺癌的CT表现及病理之间的关系。方法 收集病理证实的肺腺癌 80例 (高分化腺癌 44例 ,中分化腺癌 2 3例 ,低分化腺癌 13例 ) ,对肿瘤的CT征象与病理上的分化程度进行比较分析。结果 空气支气管征 /空泡征高分化腺癌有 3 5例 ( 79.6% ) ,中分化腺癌 7例 ( 3 0 .4% ) ,而低分化腺癌无此征。低分化腺癌的深分叶征、毛刺征、胸膜凹陷征、血管集束征出现率高。中、低分化腺癌的淋巴结及远处转移明显高于高分化腺癌。结论 CT像上结节内空气支气管征 /空泡征对于周围型腺癌的定性诊断及预后判断有重要意义 相似文献
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目的:探讨磨玻璃密度(GCO)小肺癌的CT表现与病理类型相关性。方法:搜集43例(45个)表现为纯磨玻璃密度(pGGO)或混合磨玻璃密度(mGGO)的周围型小肺癌,根据GGO占整个病灶比例的不同分三型,分别与病理对照。并有12个小肺癌术前行中长期动态观察。结果:I型(GGO成分占91%-100%)11个,病理均为细支气管肺泡癌(BAC);II型(GGO成分占51%。90%)21个,BAC11,BAC伴高分化腺癌4个,高分化腺癌4个,中分化腺癌2个;Ⅲ型(GGO成分占≤50%)13个,BAC3个,中分化腺癌5个,低分化腺癌3个,低分化鳞癌2个;通过三型间比较发现GGO所占比例越高,小肺癌的病理分化越好,GGO成分占≥50%时,病理多数为BAC(22/32);同时对部分小肺癌术前中长期动态观察及术后随访,发现肿瘤生长缓慢、预后良好。结论:局限性GGO不仅是周围型肺癌的重要征象之一,而且通过半定量分析GGO所占比例的多少,能一定程度上预测其病理类型、分化程度、倍增时间及预后。 相似文献
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目的:研究肺小腺癌中肺泡细胞癌含量与超高分辨率CT (UHRCT)扫描上磨玻璃密度(GGO)含量的相关性,并筛选出合理的CT测量阈值.方法:最大径≤2cm的肺部孤立性小腺癌52例纳入研究,采用飞利浦64层机完成UHRCT扫描,在标准算法重建1mm层厚肺窗上,分别采用-300Hu、-350Hu、-400Hu、-450Hu、-500Hu和-550Hu6种CT阈值进行病灶GGO含量的定量,同时均完成病理上肺泡细胞癌成分的半定量.两种定量进行Spearman相关性分析.结果:肺小腺癌CT上GGO含量与病理上肺泡细胞癌含量间有明显相关性,当采用阈值为-350Hu进行分析时,其相关性相对更好(r=-0.691,P=0.000).结论:肺小腺癌中肺泡细胞癌含量与CT上GGO含量具有明显相关性,以阈值-350Hu进行CT定量效果相对更好. 相似文献
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周围型肺腺癌的CT、病理表现与增殖细胞核抗原(PCNA)表达的相关性研究 总被引:6,自引:0,他引:6
目的 研究周围型肺腺癌的CT征象、病理表现与增殖细胞核抗原(PCNA)表达的相关性。资料与方法 搜集52例经手术病理证实的周围型肺腺癌,术前均行CT扫描,对手术切除的肿瘤标本进行SABC法免疫组织化学染色,检测其PCNA的表达。分析周围型肺腺癌的某些CT征象与PCNA过度表达之间的关系。结果 肿瘤的分化程度、有无肺门和/或纵隔淋巴结转移、某些CT征象与PCNA的过度表达有关。结论 PCNA的表达程度可作为反映肺腺癌增殖状态、恶性程度及淋巴结转移潜能的有效指标。周围型肺腺癌的某些CT征象对评价肿瘤的恶性生物学行为有一定意义。 相似文献
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摘要目的回顾性分析以磨玻璃小结节(ground-glass opacity,GGO)为主要特征的周围型肺腺癌的CT表现中的连续性变化与分子生物指标的相关性。材料与方法本研究经过伦理委员会认可,所有25例病人均事先告知相关事项。本研究入组标准为直径<3cm,但术前可被CT检测的肺腺癌病人。2名放射科医生通过分析GGO形态分类(纯GGO或混杂GGO)和结节体积增长来评估肿瘤生长情况。 相似文献
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目的:探讨周围型浸润性肺腺癌表皮生长因子受体(EGFR)基因突变状态与 CT 征象及病理特征的相关性。方法收集193例经病理证实为周围型浸润性肺腺癌的手术标本,采用扩增阻滞突变系统对所有标本行 EGFR基因突变检测,结合胸部 CT征象及病理资料进行回顾性分析。结果193例中EGFR基因突变率为62.2%(120/193)。在CT征象方面:基因突变组与野生型组于横轴位上肿瘤最大直径(Dmax)分别为(2.52±1.01)cm和(3.11±1.34)cm,差异有统计学意义(P<0.05)。受试者工作特征曲线(ROC)提示Dmax=2.01 cm为判断 EGFR基因突变状态的最佳诊断阈值,敏感度与特异度分别为79%和64%。含磨玻璃密度影(GGO)的肿瘤突变率为78.0%,高于无 GGO 者(56.6%),P<0.05。肿瘤不伴有囊腔样改变者突变率为65.5%,高于伴有囊腔样改变者(40.0%),P<0.05。磨玻璃影/肿瘤直径比(G/T)、分叶征、毛刺征、胸膜凹陷征、血管集束征、空气支气管征、空泡征与EGFR基因突变率无显著相关性(P值均>0.05)。在病理特征方面:组织学亚型中以贴壁生长为主型突变率为77.5%,高于其他亚型(58.2%),P<0.05。以实体生长为主型突变率为26.3%,低于其他亚型(66.1%),P<0.05。无淋巴结转移者突变率为66.9%,高于淋巴结转移者(50.9%),P<0.05。结论在周围型浸润性肺腺癌中,部分CT征象及病理特征对于辅助预测 EGFR基因突变状态具有一定价值。 相似文献
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肺内磨玻璃密度影的高分辨率CT影像病理学研究 总被引:2,自引:0,他引:2
肺内磨玻璃密度影 (ground-glassopacity, GGO)是指高分辨率CT(high-resolutionCT, HRCT)图像上表现为密度轻度增加,但其内的支气管血管束仍可显示,见于各种炎症、水肿、纤维化及肿瘤等病变。此征象常为早期肺部疾患的表现,及时发现并诊断对临床正确处理及预后的判断有重要意义。近年来,HRCT对含GGO的周围型肺小腺癌及严重急性呼吸综合征(severeacuterespiratorysyndrome, SARS)的研究,丰富了肺内GGO的影像病理特征的整体认识,现综述如下。1 病理基础GGO按照分布范围分为弥漫性和局限性 2大类。弥漫性GGO常见于过敏性肺炎… 相似文献
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周围型肺腺癌和鳞癌CT、病理表现与c-erbB-2蛋白异常表达的相关性研究 总被引:4,自引:0,他引:4
目的 :研究周围型肺腺癌和鳞癌的CT征象、病理分级与c erbB 2蛋白异常表达的关系。方法 :6 2例经手术、病理证实的周围型肺腺癌、鳞癌术前CT扫描 ,并运用免疫组织化学技术ABC法对手术切除标本进行c erbB 2蛋白检测。将检测结果与肿瘤的CT征象、病理分级进行比较 ,对统计数字进行卡方检验。结果 :①腺癌c erbB 2蛋白的过度表达高于鳞癌 (P <0 .0 5 )。②分化程度低、有肺门和 /或纵隔淋巴结转移者c erbB 2蛋白的过度表达率明显增高 (P <0 .0 5 ,P <0 0 1)。③具有棘突征、血管连接征的周围型肺腺癌和鳞癌c erbB 2蛋白过度表达率明显高于无以上征象者 ;而瘤体最大直径 >3cm的腺癌高于瘤体最大直径≤ 3cm的腺癌。④肿瘤强化明显者 ,其c erbB 2蛋白过度表达率增高 (P <0 .0 5 )。结论 :周围型肺癌c erbB 2蛋白的过度表达与组织学类型及CT表现有关 ,某些CT征象可用来判断肿瘤的生物学行为 相似文献
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目的:探讨直径≤2cm磨玻璃密度(GGO)肺腺癌的超高分辨率CT影像学表现与病理Noguchi分型的相关性.方法:回顾性分析56例表现为单纯磨玻璃密度(pGGO)或混合磨玻璃密度(mGGO)的周围型小肺癌的超高分辨率CT征象,分别与病理Noguchi分型对照.结果:病灶纯磨玻璃密度、分叶征、毛刺、胸膜凹陷、血管集束征/增粗和棘突征在各不同病理亚型中出现比率有显著差异,P值分别为0.001,0.022,0.002,0.022,0.032和0.012.而边缘、空泡、蜂房征在不同病理亚型无显著差异.结论:磨玻璃密度结节的部分形态学征象与病理Noguchi亚型有明显相关性,有助于预测病灶的恶性程度. 相似文献
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目的探讨肺局灶性磨玻璃密度结节(fGGO)的多层螺旋CT(MSCT)特征与病灶良恶性的相关性。资料与方法回顾性分析36例fGGO患者的影像学资料,包括8例炎症,18例肺泡癌,8例腺癌,2例非典型腺瘤样增生,评价病灶形态学特征及内部结构与良恶性的相关性。结果 8例炎症中7例呈斑片状;肺不典型腺瘤样增生(AAH)均为圆形或类圆形;细支气管肺泡癌(BAC)和腺癌主要呈圆形、不规则形及分叶征。11例BAC和腺癌边缘毛糙或伴毛刺征,16例边缘清晰、光整。15例胸膜凹陷征,均见于BAC和腺癌;16例胸膜增厚,3例见于炎症,13例见于BAC和腺癌。6例炎症和2例AAH为纯GGO,18例BAC和8例腺癌为混杂GGO。结论 fGGO的CT征象与病灶病理类型具有较高的相关性,对于提高其诊断准确率具有重要的临床价值。 相似文献
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One of the factors of the successful military career guidance Cadet schools students is preserving and promoting their health. Medical support of children and adolescents aged 10-17 years should include the full range of medical and preventive measures defined for this group. The state of providing outpatient care for pupils at the Cadet School in St. Petersburg was studied. These results show that full medical care in accordance with the standards can be based only on children's health clinics. It is important that the organization of medical support pupils cadet schools should be cooperate with civilian health care. 相似文献
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V. A. Serezhenkov I. A. Moroz G. A. Klevezal A. F. Vanin 《Applied radiation and isotopes》1996,47(11-12)
ESR-spectrometry was used to investigate radiation-induced paramagnetic centers in enamel of mammals: carnivores (polar bear and fox), ungulates (reindeer, European bison, moose), and man. Values at half the microwave power saturation of the radiation signal, P1/2, evaluated at room temperature, was found to range from 16 to 26 mW for animals and man. A new approach to discrimination of the radiation induced signal from the total ESR spectrum of reindeer enamel is proposed. ‘Dose-response’ dependencies of enamel of different species mammals were measured within the dose range from 0.48 up to 10.08 Gy. Estimations of ‘radiosensitivity’ enamel of carnivores and ungulates showed good agreement with radiosensitivity enamel of man by ESR method. 相似文献
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Analysis of the results of the international comparison of activity measurements of a solution of Fe
The results of an international comparison of activity measurements of a solution of 55Fe organized by the BIPM in 2005 are reported and analysed. This exercise, which follows the procedures of the CIPM mutual recognition arrangement to update older comparisons, is a renewal of the comparison organized by the BIPM that took place in 1978. A EUROMET comparison was organized in 1996 specifically to compare activity measurements of a 55Fe solution by means of liquid-scintillation techniques. Results of these three comparisons are presented and discussed in this paper.
The radionuclide solution was provided by the NPL, which also distributed the samples to the participants. The activity of the ampoules was measured by 16 laboratories using 12 methods producing 25 results. Some general considerations on uncertainty assessments pertaining to the different techniques used are drawn. The outcome of four different estimators is compared from which the presence of at least one outlier can be confirmed. Further measurements should be made to try to reduce the discrepancy between the results. To date the outcome of the present comparison does not show an improvement to that of the 1996 comparison. 相似文献
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D Gasparini 《La Radiologia medica》1987,73(4):304-309
A new method of non-surgical treatment of varicocele syndrome is described: it consists in sclerotherapy of spermatic vein by trans-femoral percutaneous catheterization with balloon-catheters. In 8 cases venous thrombosis has been induced by direct electric clotting. The techniques and a 6 months follow-up are discussed. It is pointed out that this procedure should be considered as the method of choice for tubular lesions and sub-fertility prophylaxis in young people and in childhood. 相似文献
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目的探讨延迟性脾破裂误漏诊原因和预防措施.方法回顾性分析总结12例延迟性脾破裂中的诊断和误漏诊的经验与教训.结果本组延迟性脾破裂的误漏诊5例(41.66%).对多发伤与脾破裂并存可能认识不足,外伤史轻微或伤员隐瞒外伤史,缺乏腹痛-缓解-突然再腹痛的典型病史,缺乏“对冲性脾破裂”力学分析和整体化诊断思路等为其误漏诊的主要原因.结论详细的外伤史和全面系统检查,重视腹以外多发伤掩盖腹内脏器伤及延迟性脾破裂可能.确立外伤-腹内脏器伤-脾破裂整体化诊断思路.不间断地辅以B超检查脾形态学变化和腹内有无积液,腹腔穿刺确定有无血腹、X线胸腹部检查观察左侧胸肋角和膈肌运动情况、必要时CT检查以尽早发现脾包膜下血肿,降低延迟性脾破裂误漏诊率. 相似文献