肺上皮样血管内皮瘤（pulmonary epithelioid hemangioen-dothelioma，PEH）是一种罕见的血管内皮来源的界于血管良性肿瘤与肉瘤之间的肿瘤，无特征性临床症状，影像学表现常易被误诊，确诊需依赖病理组织学及免疫组化检查。笔者搜集一例PEH 患者的病例资料，对其临床表现、影像学表现、病理形态及免疫组化结果等结合文献进行分析报道。

<正>RSNA2011在乳腺方面的论文比去年有显著增加,论文质量也有明显的提高,更注重多中心和大样本研究,尤其突出MRI常规技术在诊断和鉴别诊断方面的应用,功能性MRI技术的临床应用也不少,笔者简要概括一下本次大会的主要内容。乳腺MRI

<正>RSNA2010在乳腺方面的论文比去年有显著增加,与往年一样突出功能性成像和大样本研究。但与往年相比,这次大会主要侧重乳腺超声及MRI在乳腺方面的应用,现简要概括如下。

Objective:To analyze the X-ray film,CT and pathological features of sarcomatoid carcinoma(SC) of the lung in order to facilitate its recognition and preoperative diagnosis.Methods:11 cases of sarcomatoid carcinoma of the lung proven by surgery and pathology were collected,in which all patients received X-ray film examination,8 patients underwent pre-contrast CT scan and 5 of the 8 patients also enhanced CT scan,their images were analyzed and compared.Results:All 11 cases exhibited a single mass,of which 5 were in the left lung while the other 6 were in the right lung.There were 3 cases of central type(27.3%) and 8 cases of periphery type(72.7%).On the X-ray films,all cases had large neoplasms with inhomogeneous density.By taking pre-contrast CT scan,the average CT attenuation of the 8 cases was 29HU.Among the 8 cases,there were 4 cases with cavity,3 with lobulation,1 with spiculation,2 with obstructive pneumonia and atelectasis,3 with enlargement of lymph node of hilum and mediastinum,1 with metastasis of the lung.By using the enhanced CT scan,4 cases showed nonuniform enhancement,i.e.remarkable periphery enhancement and weak or unobvious enhancement in the central area.Pathological manifestations:the sarcomatoid tissues were more than 50% in all the 11 tumors.Among which there were 4 cases of pleomorphic carcinoma,3 cases of giant cell carcinoma,2 cases of carcinosarcoma,1 case of pulmonary blastoma,and 1 case of spindle cell carcinoma.Conclusion:Most cases of SC of the lung appear as large peripheral mass with cavity and lobulation.Contrast-enhanced CT is helpful in the diagnosis of SC of the lung as its nonuniform enhanced pattern,but the final diagnosis requires pathological examination.

2009年RSNA大会在肺部影像学研究上主要涉及以下内容,现简要概括如下. 计算机辅助诊断 本次大会关于计算机辅助诊断(CAD)的研究较上一年少,主要研究内容是其在诊断过程中的应用.Jordi等认为在对肺结节的筛查过程中CAD结合其它不同的lecture技术比单一的阅片方法可以发现更多的肺结节.

RSNA2009在乳腺方面的论文比去年的显著增加,且主要侧重于乳腺MRI技术,对计算机辅助成像,DM、DBT及乳腺的介入治疗也有论述,另外今年还增加了对乳腺影像诊断的物理成像新设备及新技术的探讨.