x-ray of lumbosacral spine: irregularity of superior endplate of S1 vertebra
x-ray of lumbosacral spine: irregularity of superior endplate of s1 vertebra
x-ray of lumbosacral spine: irregularity of superior endplate of S1 vertebra (procedure)
x-ray of lumbosacral spine: irregularity of superior endplate of s1 vertebra (procedure)