Ultrasonography Clinical Trial
Official title:
Prediction and Evaluation of Anlotinib Treatment Response Using Contrast Enhanced Ultrasound in Patients With Pheochromocytoma or Paraganglioma
Anlotinib is a multi-target receptor tyrosine kinase inhibitor (TKI) targeting tumor angiogenesis and growth. The purpose of this study is to evaluate the efficiency of contrast enhanced ultrasound in assessing effectiveness of anlotinib in patients with locally advanced, metastatic, or unresectable pheochromocytoma or paraganglioma(PPGL).
Contrast-enhanced ultrasound (CEUS) is a non-invasive and efficient imaging technique which can observe the blood flow at the tissue perfusion level with microbubble contrast agents and obtain information about tumor perfusion. There have been several studies demonstrating the utility of CEUS for early prediction of response to neoadjuvant chemotherapy in breast cancer, pancrearic cancer as well as lymphoma. However, few studies have reported the use of CEUS for the evaluation of therapeutic response in PPGL. What quantitative parameters of CEUS can early reflect the neovascular changes after treatment with anlotinib in patients with locally advanced, metastatic, or unresectable PPGL? The aim of our study is to evaluate the parameters for CEUS imaging and the therapeutic response of PPGL before and after anlotinib therapy and to determine the most useful CEUS response parameters. ;
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