本文選題：顱內(nèi)腦外腫瘤　切入點：軟骨肉瘤　出處：《臨床放射學(xué)雜志》2017年05期 　論文類型：期刊論文

【摘要】：目的探討少見單發(fā)顱內(nèi)腦外腫瘤的影像表現(xiàn)及特征,旨在提高對該類疾病影像學(xué)特征的認識。方法搜集經(jīng)手術(shù)病理證實的25例少見單發(fā)顱內(nèi)腦外腫瘤患者完整影像和臨床資料,回顧性分析其MRI及CT特點,所有患者均行MRI平掃和增強掃描,14例行CT平掃和增強掃描。結(jié)果 25例患者均為單發(fā)病灶,其中軟骨肉瘤4例,均位于硬膜外顱底骨間的軟骨結(jié)合處,CT平掃呈略低或等密度軟組織腫塊,其內(nèi)可見大小不等高密度鈣化,MRI平掃信號不均勻,T2WI呈不均勻高信號,增強掃描不均勻強化;血管外皮細胞瘤(HPC)7例,均呈分葉狀腫塊,6例病灶內(nèi)或周圍可見流空血管,3例跨硬腦膜生長;孤立性纖維性腫瘤(SFT)7例,6例可見"陰陽征",即增強掃描T2WI低信號區(qū)延遲期明顯強化;腦外型海綿狀血管瘤7例,5例跨鞍內(nèi)外生長,呈"橫葫蘆征"表現(xiàn),7例T2WI均表現(xiàn)為腦脊液樣高信號。結(jié)論以上四種腦外腫瘤臨床少見,容易誤診,但MRI表現(xiàn)均具有一定的特征性,仔細分析病變位置、形態(tài)、與血管及周圍結(jié)構(gòu)的關(guān)系及強化特點并結(jié)合CT表現(xiàn)有助于提高術(shù)前診斷的準確率。
[Abstract]:Objective to investigate the imaging features of rare solitary intracranial and extracranial tumors in order to improve the understanding of the imaging features of these diseases. Methods the complete images and clinical data of 25 patients with rare solitary intracranial extracerebral tumors proved by surgery and pathology were collected. The features of MRI and CT were retrospectively analyzed. All the patients were performed MRI plain scan and contrast-enhanced CT scan in 14 cases. Results all 25 cases were single focus, 4 cases were chondrosarcoma, 4 cases were chondrosarcoma, 4 cases were chondrosarcoma, and 4 cases were chondrosarcoma. All of them were located in the interosseous cartilage junction of the epidural skull base. The CT plain scan showed a soft tissue mass of slightly low or equal density, and the size of calcification was not equal. The MRI signal intensity was not even and the signal intensity was not even on T _ 2WI, and the enhancement was not uniform. In 7 cases of hemangiopericytoma, there were 6 cases with lobular mass and 3 cases with empty blood vessels in or around the lesion, while 7 cases with solitary fibrous tumor showed "yin and yang" sign, that is, the delayed phase of low signal area on T _ 2WI was obviously enhanced. In 7 cases of extracranial cavernous hemangioma, 5 cases grew across the Sella and 7 cases showed "transverse gourd sign" on T2WI, all of them showed cerebrospinal fluid hyperintense. Conclusion the above four kinds of extracerebral tumors are rare in clinic and easy to misdiagnose. However, all MRI findings have some characteristics. Careful analysis of the location, morphology, relationship with blood vessels and surrounding structures and enhancement features and CT findings can help to improve the accuracy of preoperative diagnosis.
【作者單位】： 昆明醫(yī)科大學(xué)第一附屬醫(yī)院醫(yī)學(xué)影像科;
【分類號】：R445.2;R739.4

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