Fat Poor Renal Angiomyolipoma Showing Collapsed Shape: A Case Report

作     者：Takahiro Fujii Makoto Hasegawa Akiko Kajiyama Toshiaki Oharaseki Yasuharu Takeuchi Tatsuya Gomi Takahiro Fujii;Makoto Hasegawa;Akiko Kajiyama;Toshiaki Oharaseki;Yasuharu Takeuchi;Tatsuya Gomi

作者机构：Department of Radiology Toho University Ohashi Medical Center Tokyo Japan Department of Pathology Toho University Ohashi Medical Center Tokyo Japan Department of Urology Toho University Ohashi Medical Center Tokyo Japan 

出 版 物：《Open Journal of Radiology》 (放射学期刊（英文）)

年 卷 期：2022年第12卷第3期

页      面：86-91页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：Fat Poor Renal Angiomyolipoma Renal Cell Carcinoma Differential Diagnosis Computed Tomography 

摘      要：Fat-poor renal angiomyolipoma (fpAML) and renal cell carcinoma (RCC) are difficult to differentiate and misdiagnosis can lead to unnecessary nephrectomy. We experienced a case showing a “collapsed shape which reflected a fpAML tissue type. A renal tumor was incidentally discovered in a 42-year-old female during an abdominal ultrasound. RCC was suspected according to CT and MRI imaging results, and a partial nephrectomy was performed. However, the pathologic diagnosis was fpAML. Upon reevaluation of preoperative images, morphological change to the tumor due to contact with surrounding tissues: the collapsed shape was observed and could be identified by CT, which is the gold standard test for differentiating renal tumors. In cases where the collapsed shape is observed in a renal tumor, fpAML should be considered.