Peripheral chondrosarcoma is a rare tumor particularly insidious when arising from the pelvis, becoming symptomatic later in time when surgery may be too difficult and dangerous due to this complex area. In the present case the tumor arose from an exostosis located on the medial surface of the left iliac wing. Its diameter was 25cm×20cm×15cm, adhering to the last three vertebrae, involving the left iliac vein and artery, displacing the left ureter. In a similar case, a hindquarter amputation is indicated but, if the patient refuses, a resection remains possible. In this paper, we describe a multistage technique consisting of an extra-anatomic vascular bypass, a lumbar stabilization, a neurovascular bundles anterior isolation and a postero-lateral resection of this mass. After a five-year follow-up, the patient is alive and able to stand and walk with support, after undergoing twice lung metastasis removal.