XXXX : radiologic and clinicopathologic features.

@entity1 @entity5 @entity730 @entity521 @entity6830
PURPOSE: The purpose of the current study was to define the imaging findings of @entity521 ( @entity521 ) and correlate them with clinicopathologic features. MATERIALS AND METHODS: The CT scans and MR images of six @entity1 with histologically confirmed @entity521 (mean age, 49 years) were retrospectively analyzed. RESULTS: The arising sites of @entity5 included the retroperitoneum (n = 2), pelvis (n = 2), anterior @entity6830 (n = 1), and adrenal gland (n = 1). The common CT finding was poorly marginated and heterogeneous mass without @entity730 . Cystic components were often found. On contrast-enhanced CT or MR images, @entity5 showed heterogeneous enhancement. On T2-weighted images, all masses demonstrated predominantly hyper signal intensity relative to skeletal muscle and the images showed heterogeneous appearance with focal areas of high intensity interspersed with septations of low signal intensity. Soft tissue masses with bone involvement were identified in one case on MR images. The CT findings in one @entity5 originating from @entity6830 were similar to those of @entity5 arising from other sites. CONCLUSION: @entity521 is an uncommon @entity5 that often pursues an aggressive clinical course, involves multiple sites, and has a poor prognosis. Tumors usually manifest on CT or MR images as a poorly demarcated mass mainly in the retroperitoneum and pelvis. Imaging studies can depict aggressive characteristics and disease extent of @entity521 .
