x-ray of lumbosacral spine: bony ankylosis of posterior elements at L3-L4
x-ray of lumbosacral spine: bony ankylosis of posterior elements at l3-l4
x-ray of lumbosacral spine: bony ankylosis of posterior elements at L3-L4 (procedure)
x-ray of lumbosacral spine: bony ankylosis of posterior elements at l3-l4 (procedure)