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GIANT PRIMARY RETROPERITONEAL DEDIFFERENTIATED LIPOSARCOMA OBSERVED IN BONE SCINTIGRAPHY WITH 99mTc-MDP. CASE REPORT

Nathalie Hernandez-Hidalgo, Diana C Quijano G, Nikolai Strusberg and Humberto Varela

Within soft tissue sarcomas, liposarcoma corresponds to the most frequent histopathological type. Around 35% of retroperitoneal liposarcomas originate from perirenal adipose tissue. It affects men more than women between the fourth and fifth decade of life. The vast majority of cases are asymptomatic until the tumor produces symptoms due to the intestinal wall's physical compression. A CT with contrast is preferred regarding imaging modalities, although, due to the biodistribution of the used radiotracer, this type of tumor can be observed in bone scintigraphy. For localized tumors, surgery is the ideal treatment, with complete resection of the tumor with negative margins being the most important prognostic factor. We present a case of a 57-year-old woman with giant primary retroperitoneal dedifferentiated liposarcoma