Lumbosacral tumors with a retroperitoneal development.

Neoplasms are relatively rare in the lumbosacral region. The present study presents two cases with tumors in the lumbosacral region, a chordoma and a tumor with multinucleated giant cells which further showed a presacral development. Some common aspects of the clinical and radiologic symptomatology were evidenced as well as the specific characteristics of each separate tumor in our cases. The diagnosis was possible due to the modern radiologic equipment.