共查询到20条相似文献,搜索用时 62 毫秒
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病例资料 患者 ,男 ,14岁。右大腿肿块进行性增大 6个月 ,加重 1周入院。患者于 2 0 0 2年 8月发现右大腿上段后方一拇指头大小的包块 ,无明显不适 ,未作治疗。后包块生长迅速 ,2 0 0 2年 12月包块增大至拳头大小 ,局部有隐痛及发热 ,曾在当地医院治疗 ,症状未见缓解。2 0 0 3年 2月出现疼痛加重 ,尤以夜间疼痛为甚 ,遂来我院要求手术治疗。查体 :右大腿未见明显畸形 ,右大腿上段后外侧见一约 2 0cm× 2 0cm× 10cm软组织肿块 ,边界清楚 ,表面光滑 ,质硬 ,可移动 ,有轻压痛。右髋关节活动中度受限 ,以屈曲内收时明显。MRI表现 :右侧股外… 相似文献
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病例资料 患者 ,女 ,17岁。因右侧大腿及足底包块、疼痛 1个月入院。体检 :右大腿后侧可触及 6cm× 12cm包块 ,其内踝后侧还可触及长条状包块 ,其边界不清楚 ,质地较硬 ,活动度较差 ,无明显搏动 ,直腿抬高试验阴性 ,右下肢肌力减退 ,无其他阳性体征。CT检查 :右侧自股骨小转子后方到足底跖趾关节处 ,沿后侧肌肉间隙内可见纵行走向的长管状稍低密度块影 ,最粗处大小约 5 .0cm× 5 .7cm ,密度均匀 ,CT值 18~2 1HU ,包块完整 ,边界清晰 (图 1、2 )。CT诊断 :右下肢多发性神经纤维瘤。手术见肿块沿右侧坐骨神经、腓神经及分支生长 ,自梨状… 相似文献
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<正>男,45岁,5年前无意中触摸到右下腹"鸡蛋样"大小包块,无不适,未行诊治,近半年来触感包块增大,偶伴隐痛,无发热、畏寒,两便正常,于2013年4月就诊。20年前有阑尾炎病史。外科检查:腹软,右下腹触及6cm×5cm大小包块,边界清,活动度好,轻压痛。实验室检查:WBC 7.8×109/L,尿常规检查阴性。腹部超声检查:右下腹探及5.4cm×3.5cm椭圆形混合回声包块,边界清,有包膜,内部透声差,超声诊断:右下腹囊实性混合包块(性质待定)。腹部CT平扫(见图1):阑尾增粗,盲肠左侧旁见一6.5cm×3.4cm椭圆形肿块,壁呈"蛋壳样"钙化,内部密度均匀,CT值约25 HU,边界清楚。 相似文献
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患者男,26岁.1年前无明显诱因出现右大腿外侧直径约3 cm无痛性结节,进行性增大,右大腿外侧可扪及大小约10 cm×8 cm×2 cm的不规则肿块,质地中等,明显压痛.
MR表现:右侧大腿中下段前外侧肌群区可见不规则肿块,呈混杂T1、混杂T2信号,肿块内可见多个类圆形、片状短T1、长T2信号,其边缘可见长T1、短T2信号包绕,肿块境界不清,大小约16.0 cm ×8.2 cm×5.3 cm,部分边缘不清,肿块包绕右侧外侧股骨约2/3,邻近骨质未见确切破坏征象,增强扫描:肿块不均匀明显强化,其内可见多个类圆形、片状无强化区(图1~4).术中见:右大腿外侧局部肿胀,皮下组织、外侧筋膜组织处渗出多,组织界限不清,右大腿股外侧肌、股直肌中下份肿胀,有明显硬结(图5).
标本病理检查:手术标本经4%甲醛固定,石蜡包埋,切片,HE染色,光镜观察,并行免疫组织化学检查. 相似文献
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Edwards CR Mountford PJ Green S Palethorpe JE Moloney AJ 《The British journal of radiology》2005,78(930):543-547
LiF:Mg:Cu:P thermoluminescent dosemeters (TLD) can be used for the same X-ray dosimetry applications as LiF:Mg:Ti, with each type having the disadvantage of a response dependent on energy, particularly at low energies. Measurements were made of the response per unit air kerma of LiF:Mg:Cu:P and LiF:Mg:Ti to nine quasi-monoenergetic X-ray beams with mean energies from 12 keV to 208 keV. Each measurement was normalized to the value produced by 6 MV X-rays. LiF:Mg:Cu:P was found to under-respond to a majority of these radiations whereas LiF:Mg:Ti over-responded to a majority. Their smallest relative measured response was produced by the lowest energy beam, and the maximum measured relative response of 1.15+/-0.07 and 1.21+/-0.07 for LiF:Mg:Cu:P and LiF:Mg:Ti, respectively, occurred at 33 keV. Energy response coefficients were derived from these measurements to estimate the error introduced by using either type of TLD to measure the dose from an X-ray spectrum different to that used for its absolute response calibration. It was calculated that if the response of either type of TLD was calibrated at 100 kVp, then an error of no more than +/-2% would be introduced into measurements of tube output at potentials of 50-130 kVp. LiF:Mg:Cu:P was found to introduce a larger error (up to 30%) into the measurement of body exit dose than LiF:Mg:Ti at tube potentials of 40-150 kVp, if its absolute response was calibrated using the corresponding body entrance beam. The method should allow this type of error to be estimated in other dosimetry applications for either type of TLD. 相似文献
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