Abstract: Background: Retroperitoneal tumours are fairly common though may present as a diagnostic puzzle as a result of non specific clinical features. This study reviewed our ten-year experience in the university of Maiduguri Teaching hospital (UMTH) and the State Specialist Hospital. Patients and methods: The study reviewed all patients with retroperitoneal tumors managed at the two centres between January, 2004 and December 2013. Results: A total of 130 patients were analyzed, age ranged from 3 months to 79 years with a mean 38.75years, comprising 77males and 53 females with a male to female ratio of 1.45:1. The peak age group was 30 – 39 years .Complications at presentation include severe anemia in 16.15%, impaired renal function in 14.62%, and urinary tract infection in 11.54%. Histology of tumours revealed fibrosarcoma in 18.46% and lymphoma 15.39%. The post- operative complications include surgical site wound infection in 13.08%, acute renal failure in 3.85%, and deep vein thrombosis in 2.31%. Mortality was 13.08%. Conclusion: Retroperitoneal tumours present late and become symptomatic and palpable only when they reach significant size, they are best evaluated with good quality cross – sectional imaging and preoperative histology by core needle biopsy. Complete surgical resection is the most potential curative treatment modality for retroperitoneal sarcomas and is best performed by a multidisciplinary sarcoma team.