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99Tcm-MDP全身骨显像(whole-body bone scan,WBS)是最常用的核医学检查方法之一。在临床上,除骨骼、肾脏和膀胱可见显影外,心肌、肌肉等骨外软组织也可见异常显影。慢性肾功能不全、甲状旁腺功能亢进症等均可引起全身或局部软组织内钙盐沉积,继而引发转移性钙化或钙化防御,99Tcm-MDP可通过化学吸附方式定位于钙盐表面而显影[1]。我们报道了1例慢性肾功能不全长期腹膜透析的钙化防御伴左心室转移性钙化99Tcm-MDP SPECT/CT显像的病例,在排除显像剂质量及采集技术问题后,结合患者临床症状及实验室检查结果,针对特定部位行99Tcm-MDP SPECT/CT显像,在缺少组织病理学检查结果的情况下充分发挥其诊断效能,以期为临床医师提供参考。
钙化防御伴左心室转移性钙化99Tcm-MDP SPECT/CT显像一例
99Tcm-MDP SPECT/CT imaging of calciphylaxis and left ventricular metastatic calcification: a case report
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摘要: 笔者报道了1例慢性肾功能不全长期腹膜透析的钙化防御伴左心室转移性钙化99Tcm-亚甲基二膦酸盐(MDP)SPECT/CT显像的病例,显像结果示左心室转移性钙化及双下肢钙化防御骨外软组织异常放射性浓聚。笔者分别从临床症状、实验室检查及影像学表现等方面分析了该病的特点,并通过文献复习加深了对钙化防御伴转移性钙化发病机制的认识。Abstract: The authors reported a case of chronic renal insufficiency with long-term peritoneal dialysis calciphylaxis and left ventricular metastatic calcification with 99Tcm-medronate (MDP) SPECT/CT imaging. The imaging results showed left ventricle metastatic calcification and lower limb calciphylaxis abnormal radioactive concentration of ertraosseous soft tissue. The authors analyzed the characteristics of the disease from the aspects of clinical symptoms, laboratory examinations and imaging findings, and deepened the understanding of the pathogenesis of calciphylaxis and metastatic calcification through literature review.
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