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Case   Generally, well-differentiated liposarcoma (WDL) has recurrence potential but lacks metastatic potential. We present a rare case of spinal metastasis of WDL component in retroperitoneal dedifferentiated liposarcoma (DDL) treated by tumor curettage and L1 laminectomy followed by percutaneous pedicle screw fixation. Histological examination showed metastasis of the WDL component of DDL. The patient was ambulatory until death.Conclusion   To our knowledge, no case of spinal metastasis of WDL component in retroperitoneal DDL has been reported. We should carefully consider characteristics of DDLs during treatment. Minimally invasive surgery may be a powerful tool in patients with spinal metastasis.

Spinal Metastasis of Well-Differentiated Liposarcoma Component in Retroperitoneal Dedifferentiated Liposarcoma Treated by Minimally Invasive Surgery