x-ray of lumbosacral spine: bony ankylosis of posterior elements at L2-L3
x-ray of lumbosacral spine: bony ankylosis of posterior elements at l2-l3
x-ray of lumbosacral spine: bony ankylosis of posterior elements at L2-L3
x-ray of lumbosacral spine: bony ankylosis of posterior elements at l2-l3