%0 Journal Article %T Fat Poor Renal Angiomyolipoma Showing Collapsed Shape: A Case Report %A Takahiro Fujii %A Makoto Hasegawa %A Akiko Kajiyama %A Toshiaki Oharaseki %A Yasuharu Takeuchi %A Tatsuya Gomi %J Open Journal of Radiology %P 86-91 %@ 2164-3032 %D 2022 %I Scientific Research Publishing %R 10.4236/ojrad.2022.123010 %X 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 ˇ°collapsed shapeˇ± 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. %K Fat Poor Renal Angiomyolipoma %K Renal Cell Carcinoma %K Differential Diagnosis %K Computed Tomography %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=119964