Giant retroperitoneal lipoma presenting with abdominal distention: A case report and review of the literature

Figure 1 Abdominal ultrasonography of the mass. A giant hyperechoic mass filling the abdomen was presented on grey-scale ultrasound. The mass had a relative clear margin and internal septas.

Figure 2 Abdominal computed tomography in the axial plane. Computed tomography imaging showed a giant homogenous mass, mainly consisting of fatty tissue measuring 16.6 cm × 28.6 cm with thin septa, pushing the peritoneal containing such as bowel loops and uterus to the right part of abdomen.

Figure 3 Macroscopic view of extracted retroperitoneal lipoma. During the operation, a bulky yellowish tumor, originating from the left retroperitoneal region, was found to occupy the retroperitoneum. The mass weighted 7.126 kg.

Figure 4 Microscopical picture of the extracted tumors (H&E, 20 ×). A: Myelolipoma was composed of mature adipose adipocytes and hematopoietic cells, without necrosis, atypia, and hyperchromatic cells; B: Conventional lipoma was composed of mature adipocytes.