x-ray of lumbosacral spine: bony ankylosis on both sides at L5-S1
x-ray of lumbosacral spine: bony ankylosis on both sides at l5-s1
x-ray of lumbosacral spine: bony ankylosis on both sides at L5-S1 (procedure)
x-ray of lumbosacral spine: bony ankylosis on both sides at l5-s1 (procedure)