HighlightsSoft tissue sarcoma accounts for less than 1% of all malignant tumors.Early diagnosis of Retroperitoneal Liposarcoma is extremely difficult due to its location and early onset lack of symptoms.Complete surgical excision remains the mainstay of treatment.Complete resection of invaded organs must be weighed for its recurrence or patient adversity.Retroperitoneal Liposarcoma of well-differentiated subtypes has a good prognosis and low metastatic potential.