Liposarcomas are rare malignant tumours of adipocytic differentiation and are classified under the soft tissue sarcoma subtype histologically. Retroperitoneal liposarcoma (RPL) has an incidence of 1 per 2.5 million individuals, and the retroperitoneum is the second most common site for a liposarcoma, following the lower limb as the most common site. The retroperitoneum is a space that can easily expand;therefore tumours grow in this space without any symptoms until they are very large. This case study reports a patien t diagnosed with a retroperitoneal liposarcoma treated with primary radical surgery and the patient is currently being followed-up in our unit with close monitoring and Computed Tomographic (CT) imaging. The patient consented to the reporting of this case.