The black arrows point to the typical stellate nuclei of a myxoid area. The green arrows point to the abundant capillaries in this area. A delicately arborizing system of capillaries is said to be one of the characteristic features of a myxoid lyposarcoma. This field is not typical in this sense. Tumor of adult life, with a peak incidence between 40 and 60 years of age.
Retroperitoneal tumors occur somewhat more frequently in women.
There is no evidence that any race or geographical area is more prone to develop liposarcomas. The three most common locations are the thigh, the retroperitoneum, and the inguinal region. Liposarcomas typically manifest a lobulated appearance. Cut section may reveal a mucinous appearance, especially if the myxoid component is prominent. Typically, at least some evidence of yellow color, due to the lipid material, is present.