Department of Urology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA.
Curr Oncol. 2023 Apr 30;30(5):4632-4647. doi: 10.3390/curroncol30050350.
This review article gives an overview of the current state of the art of bladder cancer imaging and then discusses in depth the scientific and technical merit of a novel imaging approach, tracing its evolution from murine cancer models to cancer patients. While the poor resolution of soft tissue obtained by widely available imaging options such as abdominal sonography and radiation-based CT leaves them only suitable for measuring the gross tumor volume and bladder wall thickening, dynamic contrast-enhanced magnetic resolution imaging (DCE MRI) is demonstrably superior in resolving muscle invasion. However, major barriers still exist in its adoption. Instead of injection for DCE-MRI, intravesical contrast-enhanced MRI (ICE-MRI) instills Gadolinium chelate (Gadobutrol) together with trace amounts of superparamagnetic agents for measurement of tumor volume, depth, and aggressiveness. ICE-MRI leverages leaky tight junctions to accelerate passive paracellular diffusion of Gadobutrol (604.71 Daltons) by treading the paracellular ingress pathway of fluorescein sodium and of mitomycin (<400 Daltons) into bladder tumor. The soaring cost of diagnosis and care of bladder cancer could be mitigated by reducing the use of expensive operating room resources with a potential non-surgical imaging option for cancer surveillance, thereby reducing over-diagnosis and over-treatment and increasing organ preservation.
这篇综述文章概述了膀胱癌成像的最新技术现状,然后深入讨论了一种新型成像方法的科学和技术优势,从鼠类癌症模型一直追溯到癌症患者。虽然广泛应用的成像选择,如腹部超声和基于射线的 CT,获得的软组织分辨率较差,只能用于测量大体肿瘤体积和膀胱壁增厚,但动态对比增强磁共振成像(DCE MRI)在分辨肌肉侵犯方面明显更优。然而,其应用仍然存在重大障碍。与 DCE-MRI 的注射方式不同,腔内对比增强 MRI(ICE-MRI)将镧系元素螯合物(Gadobutrol)与痕量超顺磁剂一起注入,用于测量肿瘤体积、深度和侵袭性。ICE-MRI 利用渗漏的紧密连接,通过踩踏荧光素钠和丝裂霉素(<400 道尔顿)进入膀胱肿瘤的细胞旁进入途径,加速了 Gadobutrol(604.71 道尔顿)的被动细胞旁扩散。通过提供一种潜在的非手术成像选择用于癌症监测,减少对昂贵手术室资源的使用,从而降低诊断和治疗膀胱癌的高昂成本,减少过度诊断和过度治疗,并提高器官保存率。
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