Differentional Diagnosis of the Retroperitoneal Adipose Tissue Neoplasms
Retroperitoneal neoplasms are rare pathology, considering the frequency up to 1.0% of all tumors. Most of retroperitoneal tumors (70%) have the mesenchymal origin, and the tumors composed of adipose tissue are the most common. Small size tumors are almost asymptomatic. Complains usually appear in patients with increasing size of tumor (more than 10-15 cm) because of the compression of adjacent structures and great vessels. Therefore, the problem of early diagnosis of retroperitoneal neoplasms is practically significant. We introduce literature data about the possibilities of the radiological differential diagnosis of such retroperitoneal adipose tissue neoplasms as lipoma, liposarcoma, angiomyolipoma and hibernoma.