An unusual cause of back pain in a patient with an abdominal aortic aneurysm. A case report.

A case of a 50-year-old man with chronic back pain, an abdominal aortic aneurysm and bony erosion of the lumbar spine due to a chondrosarcoma is reported. This report shows that the lumbar erosion seen in association with an aneurysm is unlikely to be a result of pressure erosion of the spine by the aneurysm, and that an extensive metastatic and septic work-up is required in such patients.