x-ray of lumbosacral spine: sclerosis of superior endplate of S1 vertebra
x-ray of lumbosacral spine: sclerosis of superior endplate of s1 vertebra
x-ray of lumbosacral spine: sclerosis of superior endplate of S1 vertebra
x-ray of lumbosacral spine: sclerosis of superior endplate of s1 vertebra