Magnetic resonance imaging features of minimal-fat angiomyolipoma and causes of preoperative misdiagnosis  

作　　者：Xiao-Long Li Li-Xin Shi Qi-Cong Du Wei Wang Li-Wei Shao Ying-Wei Wang 

机构地区：[1]Department of Radiology,First Medical Center of Chinese People’s Liberation Army General Hospital,Beijing 100853,China [2]Department of Urology Surgery,First Medical Center of Chinese People’s Liberation Army General Hospital,Beijing 100853,China

出　　处：《World Journal of Clinical Cases》2020年第12期2502-2509,共8页世界临床病例杂志

摘　　要：BACKGROUND Minimal-fat angiomyolipoma(mf-AML)is often misdiagnosed as renal cell carcinoma before surgery.AIM To analyze the magnetic resonance imaging(MRI)features of mf-AML and the causes of misdiagnosis by MRI before operation.METHODS A retrospective analysis was performed on ten patients with mf-AML confirmed by surgical pathology,all of whom underwent preoperative MRI examination to analyze the morphological characteristics and MRI signals of the tumor.RESULTS MRI revealed a circular-like mass in 4/10(40%)patients,an oval mass in 6/10 patients(60%),a mass with a capsule in 9/10 patients(90%),and a mass with a lipid component in 7/10 patients(70%).The diameter of the masses in all ten patients was from 11 to 47 mm;the diameter was between 11 mm and 40 mm in 8/10(80%)patients and between 40 mm and 47 mm in 2/10(20%)patients.CONCLUSION An oval morphological characteristic is strong evidence for the diagnosis of mf-AML,while a capsule and lipids are atypical manifestations of mf-AML.

关 键 词：Minimal-fat angiomyolipoma Magnetic resonance imaging MISDIAGNOSIS Preoperative diagnosis 

分 类 号：R732.2[医药卫生—肿瘤] R445.2[医药卫生—临床医学]