[A Case of Mesenteric Liposarcoma with Long-Term Survival after Laparoscopy-Assisted Resection].

The case was a 75-year-old man. The patient had back pain and an abdominal CT scan was performed. The scan revealed an 8 cm mass in the left lower abdomen, containing both fatty and solid components. An abdominal MRI showed the mass had shifted position, with the solid component exhibiting high signal intensity on diffusion-weighted imaging, suggesting a liposarcoma originating from the small bowel mesentery. For diagnosis and treatment, laparoscopic-assisted surgery was performed. Laparoscopic observation revealed a mobile mass within the jejunal mesentery, and a small laparotomy was conducted to remove it. Histologically, the tumor was identified as a liposarcoma with both well-differentiated and dedifferentiated components. There was no recurrence for 6 years after the surgery.