%0 Case Reports
%T An Atypical Spindle Cell/Pleomorphic Lipomatous Tumor of the Thigh With a Difficult Imaging Diagnosis That Mimicked a Malignant Lipomatous Tumor.
%A Fujibuchi T
%A Ichikawa J
%A Kawasaki T
%A Onohara K
%A Aoki K
%J Clin Nucl Med
%V 49
%N 9
%D 2024 Sep 1
%M 39102813
%F 10.782
%R 10.1097/RLU.0000000000005271
%X <B>UNASSIGNED: </B>Atypical spindle cell/pleomorphic lipomatous tumor is categorized as a benign lipomatous tumor, but various MRI findings pose accurate diagnostic challenges. In our case, both MRI and PET/CT scans indicated the possibility of atypical lipomatous tumor/well-differentiated liposarcoma or dedifferentiated liposarcoma. Needle biopsy suggested benign to low-grade malignancy; hence, we opted for the wide resection. The final diagnosis of atypical spindle cell/pleomorphic lipomatous tumor was confirmed through histopathology analysis, including immunohistochemistry and fluorescence in situ hybridization. Since achieving an accurate diagnosis solely through imaging can be challenging, histopathology remains essential.