What is your diagnostic? Aneurysm of the abdominal aorta destroying the lumber spine

A 58 year old women suffering from lombalgia over 3 years is admitted for bilateral cruralgia. Ten years before, she was treated for cervix carcinoma by hysterectomy, pelvic and lombo-aortic radiotherapy and chemotherapy. On admission, physical examination reveales L2 level hypoesthesia and abolition of deep tendon reflexes. Plain films and CT scan show a lysis of L3, L4 and L5 vertebral bodies and a cuneiform appearance of vertebral body of L2 due to a large abdominal aortic aneurysm.