case_images: PMC524188_01
case_images: Contrast enhanced computed tomography showing the tumor location between iliocostalis and psoas muscles in retroperitoneal space.
case_images: 1477-7819-2-33-1.jpg
case_images: PMC524188_01_1477-7819-2-33-1.jpg
case_images: F1
case_images: The medial margin of the tumor was deformed by a left transverse process of the second lumber spine, suggesting invasive behavior (Figure 1).
case_images: Coronal magnetic resonance imaging demonstrating the tumor beneath the left kidney.
case_images: 1477-7819-2-33-2.jpg
case_images: PMC524188_01_1477-7819-2-33-2.jpg
case_images: F2
case_images: T1-weighted phase and of heterogeneously high intensity in the T2-weighted phase. The marginal part showed very low intensity in both phases (Figure 2).
case_images: Gross appearance of the resceted tumor. The cut surface homogeneously appears gray and glossy.
case_images: 1477-7819-2-33-3.jpg
case_images: PMC524188_01_1477-7819-2-33-3.jpg
case_images: F3
case_images: On gross examination, the cut surface appeared homogeneously gray and glossy (Figure 3).
case_images: Photomicrograph showing the tumor composed of uniform spindled proliferation with moderate account of collagen fibers (hematoxylin and eosin x400).
case_images: 1477-7819-2-33-4.jpg
case_images: PMC524188_01_1477-7819-2-33-4.jpg
case_images: F4
case_images: Histologically, a uniform proliferation of spindle cells with a moderate amount of collagen fibers led to a diagnosis of extraabdominal fibromatosis in the retroperitoneal space (Figure 4).