Therapeutic experience with primary liposarcoma from the sigmoid mesocolon accompanied with well-differentiated liposarcomas in the pelvis.

[well-differentiated liposarcoma]

Multifocal liposarcoma with different histological types is rare , especially that originating from the mesentery . We herein report a case of primary myxoid liposarcoma from the sigmoid mesocolon that was accompanied with well-differentiated liposarcomas in the pelvis . The location , the fat signal and the relationship with adjacent organs of the liposarcomas were well shown in the axial , coronal and sagittal dimensions of MRI , giving a comprehensive and specific image before surgery . To alleviate the patient 's symptoms and mental stress , a laparotomy was performed . The tumors were all completely excised with macroscopic free margins . The final histopathological report showed that the tumor in the sigmoid mesocolon was a pure myxoid liposarcoma , while the pelvic tumors were spindle cell liposarcomas , a special type of well-differentiated liposarcoma . According to the AJCC staging system , they were all stage IIB . No further adjuvant therapy was performed . Close follow-up after the surgery has been performed , and the patient has remained healthy without any evidence of recurrence or metastasis for 17 months after the surgery .