Giant dedifferentiated retroperitoneal liposarcoma: CT and MRI findings

We present computed tomography, magnetic resonance imaging and pathologic findings of a 52-year-old female with a giant dedifferentiated retroperitoneal liposarcoma in which well differentiated lipoma-like and dedifferentiated components are found together. Dedifferentiated components of the mass showed various degrees of enhancement and revealed no suppression with fat saturation techniques. The diagnosis of dedifferentiated liposarcoma should be kept in mind when a mass is found with retroperitoneal localization, intense of contrast enhancement, calcifications, invasion of adjacent tissues, necrosis and haemorrhage, and the absence of fat suppression. © 2004 Elsevier Ireland Ltd. All rights reserved